/*****************************************************************************
*
* Project:  Idrisi Raster Image File Driver
* Purpose:  Read/write Idrisi Raster Image Format RST
* Author:   Ivan Lucena, [lucena_ivan at hotmail.com]
*
* Revised by Hongmei Zhu, February, 2013
* honzhu@clarku.edu
* Clark Labs/Clark University
*
******************************************************************************
* Copyright( c ) 2006, Ivan Lucena
 * Copyright (c) 2007-2012, Even Rouault <even dot rouault at mines-paris dot org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files( the "Software" ),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/

#include "cpl_conv.h"
#include "cpl_string.h"
#include "cpl_csv.h"
#include "gdal_frmts.h"
#include "gdal_pam.h"
#include "gdal_alg.h"
#include "gdal_priv.h"
#include "gdal_rat.h"
#include "ogr_spatialref.h"
#include "idrisi.h"

#include <cmath>

CPL_CVSID( "$Id: IdrisiDataset.cpp 6574497e5ddfd7c08c094a76756a0ef477cef6a1 2018-04-04 22:15:20 +0200 Even Rouault $" )

#ifdef WIN32
#  define PATHDELIM       '\\'
#else
#  define PATHDELIM       '/'
#endif

//----- Safe numeric conversion, NULL as zero
#define atoi_nz(s) (s == nullptr ? (int)      0 : atoi(s))
#define CPLAtof_nz(s) (s == nullptr ? (double) 0.0 : CPLAtof(s))

//----- file extensions:
static const char * const extRST = "rst";
static const char * const extRDC         = "rdc";
static const char * const extSMP         = "smp";
static const char * const extREF         = "ref";
// static const char * const extRSTu        = "RST";
static const char * const extRDCu        = "RDC";
static const char * const extSMPu        = "SMP";
static const char * const extREFu        = "REF";

//----- field names on rdc file:
static const char * const rdcFILE_FORMAT  = "file format ";
static const char * const rdcFILE_TITLE   = "file title  ";
static const char * const rdcDATA_TYPE    = "data type   ";
static const char * const rdcFILE_TYPE    = "file type   ";
static const char * const rdcCOLUMNS      = "columns     ";
static const char * const rdcROWS         = "rows        ";
static const char * const rdcREF_SYSTEM   = "ref. system ";
static const char * const rdcREF_UNITS    = "ref. units  ";
static const char * const rdcUNIT_DIST    = "unit dist.  ";
static const char * const rdcMIN_X        = "min. X      ";
static const char * const rdcMAX_X        = "max. X      ";
static const char * const rdcMIN_Y        = "min. Y      ";
static const char * const rdcMAX_Y        = "max. Y      ";
static const char * const rdcPOSN_ERROR   = "pos'n error ";
static const char * const rdcRESOLUTION   = "resolution  ";
static const char * const rdcMIN_VALUE    = "min. value  ";
static const char * const rdcMAX_VALUE    = "max. value  ";
static const char * const rdcDISPLAY_MIN  = "display min ";
static const char * const rdcDISPLAY_MAX  = "display max ";
static const char * const rdcVALUE_UNITS  = "value units ";
static const char * const rdcVALUE_ERROR  = "value error ";
static const char * const rdcFLAG_VALUE   = "flag value  ";
static const char * const rdcFLAG_DEFN    = "flag def'n  ";
static const char * const rdcFLAG_DEFN2   = "flag def`n  ";
static const char * const rdcLEGEND_CATS  = "legend cats ";
static const char * const rdcLINEAGES     = "lineage     ";
static const char * const rdcCOMMENTS     = "comment     ";
static const char * const rdcCODE_N       = "code %6d ";

//----- ".ref" file field names:
static const char * const refREF_SYSTEM   = "ref. system ";
static const char * const refREF_SYSTEM2  = "ref.system  ";
static const char * const refPROJECTION   = "projection  ";
static const char * const refDATUM        = "datum       " ;
static const char * const refDELTA_WGS84  = "delta WGS84 " ;
static const char * const refELLIPSOID    = "ellipsoid   ";
static const char * const refMAJOR_SAX    = "major s-ax  " ;
static const char * const refMINOR_SAX    = "minor s-ax  ";
static const char * const refORIGIN_LONG  = "origin long ";
static const char * const refORIGIN_LAT   = "origin lat  ";
static const char * const refORIGIN_X     = "origin X    ";
static const char * const refORIGIN_Y     = "origin Y    ";
static const char * const refSCALE_FAC    = "scale fac   ";
static const char * const refUNITS        = "units       ";
static const char * const refPARAMETERS   = "parameters  ";
static const char * const refSTANDL_1     = "stand ln 1  ";
static const char * const refSTANDL_2     = "stand ln 2  ";

//----- standard values:
static const char * const rstVERSION      = "Idrisi Raster A.1";
static const char * const rstBYTE         = "byte";
static const char * const rstINTEGER      = "integer";
static const char * const rstREAL         = "real";
static const char * const rstRGB24        = "rgb24";
static const char * const rstDEGREE       = "deg";
static const char * const rstMETER        = "m";
static const char * const rstLATLONG      = "latlong";
static const char * const rstLATLONG2     = "lat/long";
static const char * const rstPLANE        = "plane";
static const char * const rstUTM          = "utm-%d%c";
static const char * const rstSPC          = "spc%2d%2s%d";

//----- palette file( .smp ) header size:
constexpr int smpHEADERSIZE = 18;

//----- check if file exists:
bool FileExists( const char *pszPath );

//----- Reference Table
struct ReferenceTab {
    int nCode;
    const char *pszName;
};

//----- USA State's reference table to USGS PCS Code
constexpr ReferenceTab aoUSStateTable[] = {
    {101,     "al"},
    {201,     "az"},
    {301,     "ar"},
    {401,     "ca"},
    {501,     "co"},
    {600,     "ct"},
    {700,     "de"},
    {901,     "fl"},
    {1001,    "ga"},
    {1101,    "id"},
    {1201,    "il"},
    {1301,    "in"},
    {1401,    "ia"},
    {1501,    "ks"},
    {1601,    "ky"},
    {1701,    "la"},
    {1801,    "me"},
    {1900,    "md"},
    {2001,    "ma"},
    {2111,    "mi"},
    {2201,    "mn"},
    {2301,    "ms"},
    {2401,    "mo"},
    {2500,    "mt"},
    {2600,    "ne"},
    {2701,    "nv"},
    {2800,    "nh"},
    {2900,    "nj"},
    {3001,    "nm"},
    {3101,    "ny"},
    {3200,    "nc"},
    {3301,    "nd"},
    {3401,    "oh"},
    {3501,    "ok"},
    {3601,    "or"},
    {3701,    "pa"},
    {3800,    "ri"},
    {3900,    "sc"},
    {4001,    "sd"},
    {4100,    "tn"},
    {4201,    "tx"},
    {4301,    "ut"},
    {4400,    "vt"},
    {4501,    "va"},
    {4601,    "wa"},
    {4701,    "wv"},
    {4801,    "wv"},
    {4901,    "wy"},
    {5001,    "ak"},
    {5101,    "hi"},
    {5200,    "pr"}
};

//---- The origin table for USA State Plane Systems
struct OriginTab83 {
    double longitude;
    double latitude;
    const char *spcs;
};

constexpr int ORIGIN_COUNT = 148;

//---- USA State plane coordinate system in IDRISI
static const OriginTab83 SPCS83Origin[] = {
        {85.83,   30.50,    "SPC83AL1"},
        {87.50,   30.00,    "SPC83AL2"},
        {176.00,  51.00,    "SPC83AK0"},
        {142.00,  54.00,    "SPC83AK2"},
        {146.00,  54.00,    "SPC83AK3"},
        {150.00,  54.00,    "SPC83AK4"},
        {154.00,  54.00,    "SPC83AK5"},
        {158.00,  54.00,    "SPC83AK6"},
        {162.00,  54.00,    "SPC83AK7"},
        {166.00,  54.00,    "SPC83AK8"},
        {170.00,  54.00,    "SPC83AK9"},
        {110.17,  31.00,    "SPC83AZ1"},
        {111.92,  31.00,    "SPC83AZ2"},
        {113.75,  31.00,    "SPC83AZ3"},
        {92.00,   34.33,    "SPC83AR1"},
        {92.00,   32.67,    "SPC83AR2"},
        {122.00,  39.33,    "SPC83CA1"},
        {122.00,  37.67,    "SPC83CA2"},
        {120.50,  36.50,    "SPC83CA3"},
        {119.00,  35.33,    "SPC83CA4"},
        {118.00,  33.50,    "SPC83CA5"},
        {116.25,  32.17,    "SPC83CA6"},
        {105.50,  39.33,    "SPC83CO1"},
        {105.50,  37.83,    "SPC83CO2"},
        {105.50,  36.67,    "SPC83CO3"},
        {72.75,   40.83,    "SPC83CT1"},
        {75.42,   38.00,    "SPC83DE1"},
        {81.00,   24.33,    "SPC83FL1"},
        {82.00,   24.33,    "SPC83FL2"},
        {84.50,   29.00,    "SPC83FL3"},
        {82.17,   30.00,    "SPC83GA1"},
        {84.17,   30.00,    "SPC83GA2"},
        {155.50,  18.83,    "SPC83HI1"},
        {156.67,  20.33,    "SPC83HI2"},
        {158.00,  21.17,    "SPC83HI3"},
        {159.50,  21.83,    "SPC83HI4"},
        {160.17,  21.67,    "SPC83HI5"},
        {112.17,  41.67,    "SPC83ID1"},
        {114.00,  41.67,    "SPC83ID2"},
        {115.75,  41.67,    "SPC83ID3"},
        {88.33,   36.67,    "SPC83IL1"},
        {90.17,   36.67,    "SPC83IL1"},
        {85.67,   37.50,    "SPC83IN1"},
        {87.08,   37.50,    "SPC83IN2"},
        {93.50,   41.50,    "SPC83IA1"},
        {93.50,   40.00,    "SPC83IA1"},
        {98.00,   38.33,    "SPC83KS1"},
        {98.50,   36.67,    "SPC83KS2"},
        {84.25,   37.50,    "SPC83KY1"},
        {85.75,   36.33,    "SPC83KY2"},
        {92.50,   30.50,    "SPC83LA1"},
        {91.33,   28.50,    "SPC83LA2"},
        {91.33,   25.50,    "SPC83LA3"},
        {92.50,   30.67,    "SPC27LA1"},//NAD27 system
        {91.33,   28.67,    "SPC27LA2"},
        {91.33,   25.67,    "SPC27LA3"},//
        {68.50,   43.67,    "SPC83ME1"},
        {68.50,   43.83,    "SPC27ME1"},//NAD27
        {70.17,   42.83,    "SPC83ME2"},
        {77.00,   37.67,    "SPC83MD1"},//
        {77.00,   37.83,    "SPC27MD1"},//NAD27
        {71.50,   41.00,    "SPC83MA1"},
        {70.50,   41.00,    "SPC83MA2"},
        {87.00,   44.78,    "SPC83MI1"},
        {84.37,   43.32,    "SPC83MI2"},
        {84.37,   41.50,    "SPC83MI3"},
        {84.33,   43.32,    "SPC27MI2"},//NAD27 L
        {84.33,   41.50,    "SPC27MI3"},//NAD27 L
        {83.67,   41.50,    "SPC27MI4"},//NAD27 TM
        {85.75,   41.50,    "SPC27MI5"},//NAD27 TM
        {88.75,   41.50,    "SPC27MI6"},//NAD27 TM
        {93.10,   46.50,    "SPC83MN1"},
        {94.25,   45.00,    "SPC83MN2"},
        {94.00,   43.00,    "SPC83MN3"},
        {88.83,   29.50,    "SPC83MS1"},
        {90.33,   29.50,    "SPC83MS2"},
        {88.83,   29.67,    "SPC83MS1"},//NAD27
        {90.33,   30.50,    "SPC83MS2"},//
        {90.50,   35.83,    "SPC83MO1"},
        {92.50,   35.83,    "SPC83MO2"},
        {94.50,   36.17,    "SPC83MO3"},
        {109.50,  44.25,    "SPC83MT1"},
        {109.50,  47.00,    "SPC27MT1"},//NAD27
        {109.50,  45.83,    "SPC27MT2"},
        {109.50,  44.00,    "SPC27MT3"},//
        {100.00,  39.83,    "SPC83NE1"},
        {115.58,  34.75,    "SPC83NV1"},
        {116.67,  34.75,    "SPC83NV2"},
        {118.58,  34.75,    "SPC83NV3"},
        {71.67,   42.50,    "SPC83NH1"},
        {74.50,   38.83,    "SPC83NJ1"},
        {74.67,   38.83,    "SPC27NJ1"},//NAD27
        {104.33,  31.00,    "SPC83NM1"},
        {106.25,  31.00,    "SPC83NM2"},
        {107.83,  31.00,    "SPC83NM3"},
        {74.50,   38.83,    "SPC83NY1"},
        {76.58,   40.00,    "SPC83NY2"},
        {78.58,   40.00,    "SPC83NY3"},
        {74.00,   40.17,    "SPC83NY4"},
        {74.33,   40.00,    "SPC27NY1"},//NAD27
        {74.00,   40.50,    "SPC27NY4"},//
        {79.00,   33.75,    "SPC83NC1"},
        {100.50,  47.00,    "SPC83ND1"},
        {100.50,  45.67,    "SPC83ND2"},
        {82.50,   39.67,    "SPC83OH1"},
        {82.50,   38.00,    "SPC83OH2"},
        {98.00,   35.00,    "SPC83OK1"},
        {98.00,   33.33,    "SPC83OK2"},
        {120.50,  43.67,    "SPC83OR1"},
        {120.50,  41.67,    "SPC83OR2"},
        {77.75,   40.17,    "SPC83PA1"},
        {77.75,   39.33,    "SPC83PA2"},
        {71.50,   41.08,    "SPC83RI1"},
        {81.00,   31.83,    "SPC83SC1"},
        {81.00,   33.00,    "SPC27SC1"},//NAD27
        {81.00,   31.83,    "SPC27SC2"},//NAD27
        {100.00,  43.83,    "SPC83SD1"},
        {100.33,  42.33,    "SPC83SD2"},
        {86.00,   34.33,    "SPC83TN1"},
        {86.00,   34.67,    "SPC27TN1"},//NAD27
        {101.50,  34.00,    "SPC83TX1"},//
        {98.50,   31.67,    "SPC83TX2"},
        {100.33,  29.67,    "SPC83TX3"},
        {99.00,   27.83,    "SPC83TX4"},
        {98.50,   25.67,    "SPC83TX5"},
        {97.50,   31.67,    "SPC27TX2"},//NAD27
        {111.50,  40.33,    "SPC83UT1"},
        {111.50,  38.33,    "SPC83UT2"},
        {111.50,  36.67,    "SPC83UT3"},
        {72.50,   42.50,    "SPC83VT1"},
        {78.50,   37.67,    "SPC83VA1"},
        {78.50,   36.33,    "SPC83VA2"},
        {120.83,  47.00,    "SPC83WA1"},
        {120.50,  45.33,    "SPC83WA2"},
        {79.50,   38.50,    "SPC83WV1"},
        {81.00,   37.00,    "SPC83WV2"},
        {90.00,   45.17,    "SPC83WI1"},
        {90.00,   43.83,    "SPC83WI2"},
        {90.00,   42.00,    "SPC83WI3"},
        {105.17,  40.50,    "SPC83WY1"},
        {107.33,  40.50,    "SPC83WY2"},
        {108.75,  40.50,    "SPC83WY3"},
        {110.08,  40.50,    "SPC83WY4"},
        {105.17,  40.67,    "SPC27WY1"},//NAD27
        {105.33,  40.67,    "SPC27WY2"},
        {108.75,  40.67,    "SPC27WY3"},
        {110.08,  40.67,    "SPC27WY4"},//
        {66.43,   17.83,    "SPC83PR1"}
};

//Get IDRISI State Plane name by origin
char *GetSpcs(double dfLon, double dfLat);

//change NAD from 83 to 27
void NAD83to27( char *pszOutRef, char *pszInRef);

#define US_STATE_COUNT ( sizeof( aoUSStateTable ) / sizeof( ReferenceTab ) )

//----- Get the Code of a US State
int GetStateCode ( const char *pszState );

//----- Get the state name of a Code
const char *GetStateName( int nCode );

//----- Conversion Table definition
struct ConversionTab {
    const char *pszName;
    int nDefaultI;
    int nDefaultG;
    double dfConv;
};

//----- Linear Unit Conversion Table
static const ConversionTab aoLinearUnitsConv[] = {
    {"m",            /*  0 */  0,   1,  1.0},
    {SRS_UL_METER,   /*  1 */  0,   1,  1.0},
    {"meters",       /*  2 */  0,   1,  1.0},
    {"metre",        /*  3 */  0,   1,  1.0},

    {"ft",           /*  4 */  4,   5,  0.3048},
    {SRS_UL_FOOT,    /*  5 */  4,   5,  0.3048},
    {"feet",         /*  6 */  4,   5,  0.3048},
    {"foot_us",      /*  7 */  4,   5,  0.3048006},
    {"u.s. foot",    /*  8 */  4,   5,  0.3048006},

    {"mi",           /*  9 */  9,  10,  1612.9},
    {"mile",         /* 10 */  9,  10,  1612.9},
    {"miles",        /* 11 */  9,  10,  1612.9},

    {"km",           /* 12 */ 12,  13,  1000.0},
    {"kilometers",   /* 13 */ 12,  13,  1000.0},
    {"kilometer",    /* 14 */ 12,  13,  1000.0},
    {"kilometre",    /* 15 */ 12,  13,  1000.0},

    {"deg",          /* 16 */ 16,  17,  0.0},
    {SRS_UA_DEGREE,  /* 17 */ 16,  17,  0.0},
    {"degrees",      /* 18 */ 16,  17,  0.0},

    {"rad",          /* 19 */ 19,  20,  0.0},
    {SRS_UA_RADIAN,  /* 20 */ 19,  20,  0.0},
    {"radians",      /* 21 */ 19,  20,  0.0}
};
#define LINEAR_UNITS_COUNT (sizeof(aoLinearUnitsConv) / sizeof(ConversionTab))

//----- Get the index of a given linear unit
static int GetUnitIndex( const char *pszUnitName );

//----- Get the default name
static char *GetUnitDefault( const char *pszUnitName, const char *pszToMeter = nullptr );

//----- Get the "to meter"
static int GetToMeterIndex( const char *pszToMeter );

//----- CSLSaveCRLF
static int  SaveAsCRLF(char **papszStrList, const char *pszFname);

/************************************************************************/
/*                     myCSLFetchNameValue()                            */
/************************************************************************/

static const char* myCSLFetchNameValue(char** papszStrList,
                                       const char* pszName)
{
    if( papszStrList == nullptr || pszName == nullptr )
        return nullptr;

    size_t nLen = strlen(pszName);
    while( nLen > 0 && pszName[nLen-1] == ' ' )
        nLen --;
    while( *papszStrList != nullptr )
    {
        if( EQUALN(*papszStrList, pszName, nLen) )
        {
            size_t i;
            for( i = nLen; (*papszStrList)[i] == ' '; ++i )
            {
            }
            if ( (*papszStrList)[i] == '=' || (*papszStrList)[i] == ':' )
            {
                return (*papszStrList) + i + 1;
            }
        }
        ++papszStrList;
    }
    return nullptr;
}

/************************************************************************/
/*                   myCSLSetNameValueSeparator()                       */
/************************************************************************/

static void myCSLSetNameValueSeparator( char ** papszList, const char *pszSeparator )
{
    const int nLines = CSLCount(papszList);

    for( int iLine = 0; iLine < nLines; ++iLine )
    {
        char* pszSep = strchr(papszList[iLine], '=');
        if( pszSep == nullptr )
            pszSep = strchr(papszList[iLine], ':');
        if( pszSep == nullptr )
            continue;
        *pszSep = '\0';
        const char* pszKey = papszList[iLine];
        const char *pszValue = pszSep + 1;
        while( *pszValue == ' ' )
            pszValue ++;

        char *pszNewLine = static_cast<char *>(
            CPLMalloc( strlen(pszValue) + strlen(pszKey)
                       + strlen(pszSeparator) + 1 ) );
        strcpy( pszNewLine, pszKey );
        strcat( pszNewLine, pszSeparator );
        strcat( pszNewLine, pszValue );
        CPLFree( papszList[iLine] );
        papszList[iLine] = pszNewLine;
    }
}

//----- Classes pre-definition:
class IdrisiRasterBand;

//  ----------------------------------------------------------------------------
//        Idrisi GDALDataset
//  ----------------------------------------------------------------------------

class IdrisiDataset : public GDALPamDataset
{
    friend class IdrisiRasterBand;

private:
    VSILFILE *fp;

    char *pszFilename;
    char *pszDocFilename;
    char **papszRDC;
    double adfGeoTransform[6];

    char *pszProjection;
    char **papszCategories;
    char *pszUnitType;
    // Move GeoReference2Wkt() into header file.
    CPLErr Wkt2GeoReference( const char *pszProjString,
        char **pszRefSystem,
        char **pszRefUnit );

protected:
    GDALColorTable *poColorTable;

public:
    IdrisiDataset();
    virtual ~IdrisiDataset();

    static GDALDataset *Open( GDALOpenInfo *poOpenInfo );
    static GDALDataset *Create( const char *pszFilename,
        int nXSize,
        int nYSize,
        int nBands,
        GDALDataType eType,
        char **papszOptions );
    static GDALDataset *CreateCopy( const char *pszFilename,
        GDALDataset *poSrcDS,
        int bStrict,
        char **papszOptions,
        GDALProgressFunc pfnProgress,
        void * pProgressData );
    virtual char **GetFileList(void) override;
    virtual CPLErr GetGeoTransform( double *padfTransform ) override;
    virtual CPLErr SetGeoTransform( double *padfTransform ) override;
    virtual const char *GetProjectionRef( void ) override;
    virtual CPLErr SetProjection( const char *pszProjString ) override;
};

//  ----------------------------------------------------------------------------
//        Idrisi GDALPamRasterBand
//  ----------------------------------------------------------------------------

class IdrisiRasterBand : public GDALPamRasterBand
{
    friend class IdrisiDataset;

    GDALRasterAttributeTable *poDefaultRAT;

private:
    int     nRecordSize;
    GByte *pabyScanLine;

public:
    IdrisiRasterBand( IdrisiDataset *poDS,
        int nBand,
        GDALDataType eDataType );
    virtual ~IdrisiRasterBand();

    virtual double GetNoDataValue( int *pbSuccess = nullptr ) override;
    virtual double GetMinimum( int *pbSuccess = nullptr ) override;
    virtual double GetMaximum( int *pbSuccess = nullptr ) override;
    virtual CPLErr IReadBlock( int nBlockXOff, int nBlockYOff, void *pImage ) override;
    virtual CPLErr IWriteBlock( int nBlockXOff, int nBlockYOff, void *pImage ) override;
    virtual GDALColorTable *GetColorTable() override;
    virtual GDALColorInterp GetColorInterpretation() override;
    virtual char **GetCategoryNames() override;
    virtual const char *GetUnitType() override;

    virtual CPLErr SetCategoryNames( char **papszCategoryNames ) override;
    virtual CPLErr SetNoDataValue( double dfNoDataValue ) override;
    virtual CPLErr SetColorTable( GDALColorTable *poColorTable ) override;
    virtual CPLErr SetUnitType( const char *pszUnitType ) override;
    virtual CPLErr SetStatistics( double dfMin, double dfMax,
                                  double dfMean, double dfStdDev ) override;
    CPLErr SetMinMax( double dfMin, double dfMax );
    virtual GDALRasterAttributeTable *GetDefaultRAT() override;
    virtual CPLErr SetDefaultRAT( const GDALRasterAttributeTable * ) override;

    float  fMaximum;
    float  fMinimum;
    bool   bFirstVal;
};

//  ------------------------------------------------------------------------  //
//                        Implementation of IdrisiDataset                     //
//  ------------------------------------------------------------------------  //

/************************************************************************/
/*                           IdrisiDataset()                            */
/************************************************************************/

IdrisiDataset::IdrisiDataset() :
    fp(nullptr),
    pszFilename(nullptr),
    pszDocFilename(nullptr),
    papszRDC(nullptr),
    pszProjection(nullptr),
    papszCategories(nullptr),
    pszUnitType(nullptr),
    poColorTable(new GDALColorTable())
{

    adfGeoTransform[0] = 0.0;
    adfGeoTransform[1] = 1.0;
    adfGeoTransform[2] = 0.0;
    adfGeoTransform[3] = 0.0;
    adfGeoTransform[4] = 0.0;
    adfGeoTransform[5] = 1.0;
}

/************************************************************************/
/*                           ~IdrisiDataset()                           */
/************************************************************************/

IdrisiDataset::~IdrisiDataset()
{
    FlushCache();

    if( papszRDC != nullptr && eAccess == GA_Update  )
    {
        //int bSuccessMin = FALSE;
        //int bSuccessMax = FALSE;

        double dfMin = 0.0;
        double dfMax = 0.0;
        double dfMean = 0.0;
        double dfStdDev = 0.0;

        for( int i = 0; i < nBands; i++ )
        {
            IdrisiRasterBand *poBand = (IdrisiRasterBand*) GetRasterBand( i + 1 );
            poBand->ComputeStatistics( false, &dfMin, &dfMax, &dfMean, &dfStdDev, nullptr, nullptr);
            /*
              dfMin = poBand->GetMinimum( &bSuccessMin );
              dfMax = poBand->GetMaximum( &bSuccessMax );

              if( ! ( bSuccessMin && bSuccessMax ) )
              {
              poBand->GetStatistics( false, true, &dfMin, &dfMax, NULL, NULL );
              }
            */
            poBand->SetMinMax( dfMin, dfMax);
        }

        myCSLSetNameValueSeparator( papszRDC, ": " );
        SaveAsCRLF( papszRDC, pszDocFilename );
    }
    CSLDestroy( papszRDC );

    if( poColorTable )
    {
        delete poColorTable;
    }
    CPLFree( pszFilename );
    CPLFree( pszDocFilename );
    CPLFree( pszProjection );
    CSLDestroy( papszCategories );
    CPLFree( pszUnitType );

    if( fp != nullptr )
        VSIFCloseL( fp );
}

/************************************************************************/
/*                                Open()                                */
/************************************************************************/

GDALDataset *IdrisiDataset::Open( GDALOpenInfo *poOpenInfo )
{
    if(  ( poOpenInfo->fpL == nullptr ) || (EQUAL( CPLGetExtension( poOpenInfo->pszFilename ), extRST ) == FALSE ))//modified
        return nullptr;

    // --------------------------------------------------------------------
    //      Check the documentation file .rdc
    // --------------------------------------------------------------------

    const char *pszLDocFilename = CPLResetExtension( poOpenInfo->pszFilename, extRDC );

    if( ! FileExists( pszLDocFilename ) )
    {
        pszLDocFilename = CPLResetExtension( poOpenInfo->pszFilename, extRDCu );

        if( ! FileExists( pszLDocFilename ) )
        {
            return nullptr;
        }
    }

    char **papszLRDC = CSLLoad( pszLDocFilename );

    myCSLSetNameValueSeparator( papszLRDC, ":" );

    const char *pszVersion = myCSLFetchNameValue( papszLRDC, rdcFILE_FORMAT );

    if( pszVersion == nullptr || !EQUAL( pszVersion, rstVERSION ) )
    {
        CSLDestroy( papszLRDC );
        return nullptr;
    }

    // --------------------------------------------------------------------
    //      Create a corresponding GDALDataset
    // --------------------------------------------------------------------

    IdrisiDataset *poDS = new IdrisiDataset();
    poDS->eAccess = poOpenInfo->eAccess;
    poDS->pszFilename = CPLStrdup( poOpenInfo->pszFilename );

    if( poOpenInfo->eAccess == GA_ReadOnly )
    {
        poDS->fp = VSIFOpenL( poDS->pszFilename, "rb" );
    }
    else
    {
        poDS->fp = VSIFOpenL( poDS->pszFilename, "r+b" );
    }

    if( poDS->fp == nullptr )
    {
        CSLDestroy( papszLRDC );
        delete poDS;
        return nullptr;
    }

    poDS->pszDocFilename = CPLStrdup( pszLDocFilename );
    poDS->papszRDC = CSLDuplicate( papszLRDC );
    CSLDestroy( papszLRDC );

    // --------------------------------------------------------------------
    //      Load information from rdc
    // --------------------------------------------------------------------

    poDS->nRasterXSize = atoi_nz( myCSLFetchNameValue( poDS->papszRDC, rdcCOLUMNS ) );
    poDS->nRasterYSize = atoi_nz( myCSLFetchNameValue( poDS->papszRDC, rdcROWS ) );
    if( !GDALCheckDatasetDimensions(poDS->nRasterXSize, poDS->nRasterYSize) )
    {
        delete poDS;
        return nullptr;
    }

    // --------------------------------------------------------------------
    //      Create band information
    // --------------------------------------------------------------------

    const char *pszDataType = myCSLFetchNameValue( poDS->papszRDC, rdcDATA_TYPE );
    if( pszDataType == nullptr )
    {
        delete poDS;
        return nullptr;
    }

    if( EQUAL( pszDataType, rstBYTE ) )
    {
        poDS->nBands = 1;
        poDS->SetBand( 1, new IdrisiRasterBand( poDS, 1, GDT_Byte ) );
    }
    else if( EQUAL( pszDataType, rstINTEGER ) )
    {
        poDS->nBands = 1;
        poDS->SetBand( 1, new IdrisiRasterBand( poDS, 1, GDT_Int16 ) );
    }
    else if( EQUAL( pszDataType, rstREAL ) )
    {
        poDS->nBands = 1;
        poDS->SetBand( 1, new IdrisiRasterBand( poDS, 1, GDT_Float32 ) );
    }
    else if( EQUAL( pszDataType, rstRGB24 ) )
    {
        poDS->nBands = 3;
        poDS->SetBand( 1, new IdrisiRasterBand( poDS, 1, GDT_Byte ) );
        poDS->SetBand( 2, new IdrisiRasterBand( poDS, 2, GDT_Byte ) );
        poDS->SetBand( 3, new IdrisiRasterBand( poDS, 3, GDT_Byte ) );
    }
    else
    {
        CPLError(CE_Failure, CPLE_AppDefined,
                 "Unknown data type : %s", pszDataType);
        delete poDS;
        return nullptr;
    }

    for(int i=0;i<poDS->nBands;i++)
    {
        IdrisiRasterBand* band = (IdrisiRasterBand*) poDS->GetRasterBand(i+1);
        if (band->pabyScanLine == nullptr)
        {
            delete poDS;
            return nullptr;
        }
    }

    // --------------------------------------------------------------------
    //      Load the transformation matrix
    // --------------------------------------------------------------------

    const char *pszMinX = myCSLFetchNameValue( poDS->papszRDC, rdcMIN_X );
    const char *pszMaxX = myCSLFetchNameValue( poDS->papszRDC, rdcMAX_X );
    const char *pszMinY = myCSLFetchNameValue( poDS->papszRDC, rdcMIN_Y );
    const char *pszMaxY = myCSLFetchNameValue( poDS->papszRDC, rdcMAX_Y );
    const char *pszUnit = myCSLFetchNameValue( poDS->papszRDC, rdcUNIT_DIST );

    if( pszMinX != nullptr && strlen( pszMinX ) > 0 &&
        pszMaxX != nullptr && strlen( pszMaxX ) > 0 &&
        pszMinY != nullptr && strlen( pszMinY ) > 0 &&
        pszMaxY != nullptr && strlen( pszMaxY ) > 0 &&
        pszUnit != nullptr && strlen( pszUnit ) > 0 )
    {
        double dfMinX, dfMaxX, dfMinY, dfMaxY, dfUnit, dfXPixSz, dfYPixSz;

        dfMinX = CPLAtof_nz( pszMinX );
        dfMaxX = CPLAtof_nz( pszMaxX );
        dfMinY = CPLAtof_nz( pszMinY );
        dfMaxY = CPLAtof_nz( pszMaxY );
        dfUnit = CPLAtof_nz( pszUnit );

        dfMinX = dfMinX * dfUnit;
        dfMaxX = dfMaxX * dfUnit;
        dfMinY = dfMinY * dfUnit;
        dfMaxY = dfMaxY * dfUnit;

        dfYPixSz = ( dfMinY - dfMaxY ) / poDS->nRasterYSize;
        dfXPixSz = ( dfMaxX - dfMinX ) / poDS->nRasterXSize;

        poDS->adfGeoTransform[0] = dfMinX;
        poDS->adfGeoTransform[1] = dfXPixSz;
        poDS->adfGeoTransform[2] = 0.0;
        poDS->adfGeoTransform[3] = dfMaxY;
        poDS->adfGeoTransform[4] = 0.0;
        poDS->adfGeoTransform[5] = dfYPixSz;
    }

    // --------------------------------------------------------------------
    //      Set Color Table in the presence of a smp file
    // --------------------------------------------------------------------

    if( poDS->nBands != 3 )
    {
        const char *pszSMPFilename = CPLResetExtension( poDS->pszFilename, extSMP );
        VSILFILE *fpSMP = VSIFOpenL( pszSMPFilename, "rb" );
        if( fpSMP != nullptr )
        {
            int dfMaxValue = atoi_nz( myCSLFetchNameValue( poDS->papszRDC, rdcMAX_VALUE ) );
            int nCatCount = atoi_nz( myCSLFetchNameValue( poDS->papszRDC, rdcLEGEND_CATS ) );
            if( nCatCount == 0 )
                dfMaxValue = 255;
            VSIFSeekL( fpSMP, smpHEADERSIZE, SEEK_SET );
            GDALColorEntry oEntry;
            unsigned char aucRGB[3];
            int i = 0;
            while( ( VSIFReadL( &aucRGB, sizeof( aucRGB ), 1, fpSMP ) ) &&( i <= dfMaxValue ) )
            {
                oEntry.c1 = (short) aucRGB[0];
                oEntry.c2 = (short) aucRGB[1];
                oEntry.c3 = (short) aucRGB[2];
                oEntry.c4 = (short) 255;
                poDS->poColorTable->SetColorEntry( i, &oEntry );
                i++;
            }
            VSIFCloseL( fpSMP );
        }
    }

    // --------------------------------------------------------------------
    //      Check for Unit Type
    // --------------------------------------------------------------------

    const char *pszValueUnit = myCSLFetchNameValue( poDS->papszRDC, rdcVALUE_UNITS );

    if( pszValueUnit == nullptr )
        poDS->pszUnitType = CPLStrdup( "unspecified" );
    else
    {
        if( STARTS_WITH_CI( pszValueUnit, "meter" ) )
        {
            poDS->pszUnitType = CPLStrdup( "m" );
        }
        else if( STARTS_WITH_CI(pszValueUnit, "feet") )
        {
            poDS->pszUnitType = CPLStrdup( "ft" );
        }
        else
            poDS->pszUnitType = CPLStrdup( pszValueUnit );
    }

    // --------------------------------------------------------------------
    //      Check for category names.
    // --------------------------------------------------------------------

    int nCatCount = atoi_nz( myCSLFetchNameValue( poDS->papszRDC, rdcLEGEND_CATS ) );

    if( nCatCount > 0 )
    {
        // ----------------------------------------------------------------
        //      Sequentialize categories names, from 0 to the last "code n"
        // ----------------------------------------------------------------

        int nLine = -1;
        for( int i = 0;( i < CSLCount( poDS->papszRDC ) ) &&( nLine == -1 ); i++ )
            if( EQUALN( poDS->papszRDC[i], rdcLEGEND_CATS, 11 ) )
                nLine = i;//get the line where legend cats is

        if( nLine > 0 )
        {
            int nCode = 0;
            int nCount = 0;
            sscanf( poDS->papszRDC[++nLine], rdcCODE_N, &nCode );//assign legend cats to nCode
            for( int i = 0;( i < 255 ) &&( nCount < nCatCount ); i++ )
            {
                if( i == nCode )
                {
                    poDS->papszCategories =
                        CSLAddString( poDS->papszCategories,
                        CPLParseNameValue( poDS->papszRDC[nLine], nullptr ) );
                    nCount++;
                    if( nCount < nCatCount )
                        sscanf( poDS->papszRDC[++nLine], rdcCODE_N, &nCode );
                }
                else
                    poDS->papszCategories = CSLAddString( poDS->papszCategories, "" );
            }
        }
    }

    /* -------------------------------------------------------------------- */
    /*      Automatic Generated Color Table                                 */
    /* -------------------------------------------------------------------- */

    if( poDS->papszCategories != nullptr &&
      ( poDS->poColorTable->GetColorEntryCount() == 0 ) )
    {
        int nEntryCount = CSLCount(poDS->papszCategories);

        GDALColorEntry sFromColor;
        sFromColor.c1 = (short) ( 255 );
        sFromColor.c2 = (short) ( 0 );
        sFromColor.c3 = (short) ( 0 );
        sFromColor.c4 = (short) ( 255 );

        GDALColorEntry sToColor;
        sToColor.c1 = (short) ( 0 );
        sToColor.c2 = (short) ( 0 );
        sToColor.c3 = (short) ( 255 );
        sToColor.c4 = (short) ( 255 );

        poDS->poColorTable->CreateColorRamp(
            0, &sFromColor, ( nEntryCount - 1 ), &sToColor );
    }

    /* -------------------------------------------------------------------- */
    /*      Initialize any PAM information.                                 */
    /* -------------------------------------------------------------------- */

    poDS->SetDescription( poOpenInfo->pszFilename );
    poDS->TryLoadXML();

    /* -------------------------------------------------------------------- */
    /*      Check for external overviews.                                   */
    /* -------------------------------------------------------------------- */

    poDS->oOvManager.Initialize( poDS, poOpenInfo->pszFilename );

    return poDS;
}

/************************************************************************/
/*                               Create()                               */
/************************************************************************/

GDALDataset *IdrisiDataset::Create( const char *pszFilename,
                                    int nXSize,
                                    int nYSize,
                                    int nBands,
                                    GDALDataType eType,
                                    char ** /* papszOptions */ )
{
    // --------------------------------------------------------------------
    //      Check input options
    // --------------------------------------------------------------------

    if( nBands != 1 && nBands != 3)
    {
      CPLError( CE_Failure, CPLE_AppDefined,
                "Attempt to create IDRISI dataset with an illegal number of bands(%d)."
                " Try again by selecting a specific band if possible. \n", nBands);
                return nullptr;
    }

    if( nBands == 3 && eType != GDT_Byte )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Attempt to create IDRISI dataset with an unsupported combination "
                  "of the number of bands(%d) and data type(%s). \n",
                  nBands, GDALGetDataTypeName( eType ) );
        return nullptr;
    }

    // ----------------------------------------------------------------
    //  Create the header file with minimum information
    // ----------------------------------------------------------------

    const char *pszLDataType = nullptr;

    switch( eType )
    {
    case GDT_Byte:
        if( nBands == 1 )
            pszLDataType = rstBYTE;
        else
            pszLDataType = rstRGB24;
        break;
    case GDT_Int16:
        pszLDataType = rstINTEGER;
        break;
    case GDT_Float32:
        pszLDataType = rstREAL;
        break;
        //--- process compatible data types
        case (GDT_UInt16):
                pszLDataType = rstINTEGER;
                CPLError( CE_Warning, CPLE_AppDefined,
                          "This process requires a conversion from %s to signed 16-bit %s, "
                          "which may cause data loss.\n",
                          GDALGetDataTypeName( eType ), rstINTEGER);
                break;
        case GDT_UInt32:
                pszLDataType = rstINTEGER;
                CPLError( CE_Warning, CPLE_AppDefined,
                          "This process requires a conversion from %s to signed 16-bit %s, "
                          "which may cause data loss.\n",
                          GDALGetDataTypeName( eType ), rstINTEGER);
                break;
        case GDT_Int32:
                pszLDataType = rstINTEGER;
                CPLError( CE_Warning, CPLE_AppDefined,
                          "This process requires a conversion from %s to signed 16-bit %s, "
                          "which may cause data loss.\n",
                          GDALGetDataTypeName( eType ), rstINTEGER);
                break;
        case GDT_Float64:
                pszLDataType = rstREAL;
                CPLError( CE_Warning, CPLE_AppDefined,
                          "This process requires a conversion from %s to float 32-bit %s, "
                          "which may cause data loss.\n",
                          GDALGetDataTypeName( eType ), rstREAL);
                break;
    default:
        CPLError( CE_Failure, CPLE_AppDefined,
            "Attempt to create IDRISI dataset with an illegal "
            "data type(%s).\n",
            GDALGetDataTypeName( eType ) );
        return nullptr;
    };

    char **papszLRDC = nullptr;
    papszLRDC = CSLAddNameValue( papszLRDC, rdcFILE_FORMAT,   rstVERSION );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcFILE_TITLE,    "" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcDATA_TYPE,     pszLDataType );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcFILE_TYPE,     "binary" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcCOLUMNS,       CPLSPrintf( "%d", nXSize ) );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcROWS,          CPLSPrintf( "%d", nYSize ) );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcREF_SYSTEM,    "plane" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcREF_UNITS,     "m" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcUNIT_DIST,     "1" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcMIN_X,         "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcMAX_X,         CPLSPrintf( "%d", nXSize ) );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcMIN_Y,         "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcMAX_Y,         CPLSPrintf( "%d", nYSize ) );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcPOSN_ERROR,    "unspecified" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcRESOLUTION,    "1.0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcMIN_VALUE,     "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcMAX_VALUE,     "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcDISPLAY_MIN,   "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcDISPLAY_MAX,   "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcVALUE_UNITS,   "unspecified" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcVALUE_ERROR,   "unspecified" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcFLAG_VALUE,    "none" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcFLAG_DEFN,     "none" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcLEGEND_CATS,   "0" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcLINEAGES,      "" );
    papszLRDC = CSLAddNameValue( papszLRDC, rdcCOMMENTS,      "" );

    const char *pszLDocFilename = CPLResetExtension( pszFilename, extRDC );

    myCSLSetNameValueSeparator( papszLRDC, ": " );
    SaveAsCRLF( papszLRDC, pszLDocFilename );
    CSLDestroy( papszLRDC );

    // ----------------------------------------------------------------
    //  Create an empty data file
    // ----------------------------------------------------------------

    VSILFILE *fp = VSIFOpenL( pszFilename, "wb+" );

    if( fp == nullptr )
    {
        CPLError( CE_Failure, CPLE_OpenFailed,
            "Attempt to create file %s' failed.\n", pszFilename );
        return nullptr;
    }

    const int nTargetDTSize = EQUAL(pszLDataType, rstBYTE) ? 1 :
                              EQUAL(pszLDataType, rstINTEGER) ? 2 :
                              EQUAL(pszLDataType, rstRGB24) ? 3 : 4;
    VSIFTruncateL(fp,
                  static_cast<vsi_l_offset>(nXSize) * nYSize * nTargetDTSize);
    VSIFCloseL( fp );

    return (IdrisiDataset *) GDALOpen( pszFilename, GA_Update );
}

/************************************************************************/
/*                             CreateCopy()                             */
/************************************************************************/

GDALDataset *IdrisiDataset::CreateCopy( const char *pszFilename,
                                       GDALDataset *poSrcDS,
                                       int bStrict,
                                       char **papszOptions,
                                       GDALProgressFunc pfnProgress,
                                       void *pProgressData )
{
    if( !pfnProgress( 0.0, nullptr, pProgressData ) )
        return nullptr;

    // ------------------------------------------------------------------------
    //      Check number of bands
    // ------------------------------------------------------------------------
    if ( !( poSrcDS->GetRasterCount() == 1 ) && !( poSrcDS->GetRasterCount() == 3 ))
    {
            CPLError( CE_Failure, CPLE_AppDefined,
            "Attempt to create IDRISI dataset with an illegal number of bands(%d)."
            " Try again by selecting a specific band if possible.\n",
                            poSrcDS->GetRasterCount() );
            return nullptr;
    }
    if ( ( poSrcDS->GetRasterCount() == 3 ) &&
         ( ( poSrcDS->GetRasterBand( 1 )->GetRasterDataType() != GDT_Byte ) ||
         ( poSrcDS->GetRasterBand( 2 )->GetRasterDataType() != GDT_Byte ) ||
         ( poSrcDS->GetRasterBand( 3 )->GetRasterDataType() != GDT_Byte ) ) )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Attempt to create IDRISI dataset with an unsupported "
                  "data type when there are three bands. Only BYTE allowed.\n"
                  "Try again by selecting a specific band to convert if possible.\n");
        return nullptr;
    }

    // ------------------------------------------------------------------------
    //      Check Data types
    // ------------------------------------------------------------------------

    for( int i = 1; i <= poSrcDS->GetRasterCount(); i++ )
    {
        GDALDataType eType = poSrcDS->GetRasterBand( i )->GetRasterDataType();

        if( bStrict )
        {
            if( eType != GDT_Byte &&
                eType != GDT_Int16 &&
                eType != GDT_Float32 )
            {
                CPLError( CE_Failure, CPLE_AppDefined,
                    "Attempt to create IDRISI dataset in strict mode "
                    "with an illegal data type(%s).\n",
                    GDALGetDataTypeName( eType ) );
                return nullptr;
            }
        }
        else
        {
            if( eType != GDT_Byte &&
                eType != GDT_Int16 &&
                eType != GDT_UInt16 &&
                eType != GDT_UInt32 &&
                eType != GDT_Int32 &&
                eType != GDT_Float32 &&
                eType != GDT_Float64 )
            {
                CPLError( CE_Failure, CPLE_AppDefined,
                          "Attempt to create IDRISI dataset with an illegal data type(%s).\n",
                    GDALGetDataTypeName( eType ) );
                return nullptr;
            }
        }
    }

    // --------------------------------------------------------------------
    //      Define data type
    // --------------------------------------------------------------------

    GDALRasterBand *poBand = poSrcDS->GetRasterBand( 1 );
    GDALDataType eType = poBand->GetRasterDataType();

    int bSuccessMin = FALSE;
    int bSuccessMax = FALSE;

    double dfMin = poBand->GetMinimum( &bSuccessMin );
    double dfMax = poBand->GetMaximum( &bSuccessMax );

    if( ! ( bSuccessMin && bSuccessMax ) )
    {
      poBand->GetStatistics( false, true, &dfMin, &dfMax, nullptr, nullptr );
    }

    if(!( ( eType == GDT_Byte ) ||
          ( eType == GDT_Int16 ) ||
          ( eType == GDT_Float32 ) ) )
    {
        if( eType == GDT_Float64 )
        {
            eType = GDT_Float32;
        }
        else
        {
            if( ( dfMin < (double) SHRT_MIN ) ||
                ( dfMax > (double) SHRT_MAX ) )
            {
                eType = GDT_Float32;
            }
            else
            {
                eType = GDT_Int16;
            }
        }
    }

    // --------------------------------------------------------------------
    //      Create the dataset
    // --------------------------------------------------------------------

    IdrisiDataset *poDS = (IdrisiDataset *) IdrisiDataset::Create( pszFilename,
        poSrcDS->GetRasterXSize(),
        poSrcDS->GetRasterYSize(),
        poSrcDS->GetRasterCount(),
        eType,
        papszOptions );

    if( poDS == nullptr )
        return nullptr;

    // --------------------------------------------------------------------
    //      Copy information to the dataset
    // --------------------------------------------------------------------

    double adfGeoTransform[6];
    if(  poSrcDS->GetGeoTransform(adfGeoTransform) == CE_None )
    {
        poDS->SetGeoTransform(adfGeoTransform);
    }

    if (!EQUAL(poSrcDS->GetProjectionRef(),""))
    {
        poDS->SetProjection( poSrcDS->GetProjectionRef() );
    }

    // --------------------------------------------------------------------
    //      Copy information to the raster band(s)
    // --------------------------------------------------------------------

    for( int i = 1; i <= poDS->nBands; i++ )
    {
        GDALRasterBand *poSrcBand = poSrcDS->GetRasterBand( i );
        IdrisiRasterBand* poDstBand = (IdrisiRasterBand*) poDS->GetRasterBand( i );

        if( poDS->nBands == 1 )
        {
            poDstBand->SetUnitType( poSrcBand->GetUnitType() );
            poDstBand->SetColorTable( poSrcBand->GetColorTable() );
            poDstBand->SetCategoryNames( poSrcBand->GetCategoryNames() );

            const GDALRasterAttributeTable *poRAT = poSrcBand->GetDefaultRAT();

            if( poRAT != nullptr )
            {
                poDstBand->SetDefaultRAT( poRAT );
            }
        }

        dfMin = poSrcBand->GetMinimum( nullptr );
        dfMax = poSrcBand->GetMaximum( nullptr );
        poDstBand->SetMinMax( dfMin, dfMax );
        int bHasNoDataValue;
        double dfNoDataValue = poSrcBand->GetNoDataValue( &bHasNoDataValue );
        if( bHasNoDataValue )
            poDstBand->SetNoDataValue( dfNoDataValue );
    }

    // --------------------------------------------------------------------
    //      Copy image data
    // --------------------------------------------------------------------

    if( GDALDatasetCopyWholeRaster( (GDALDatasetH) poSrcDS,
                                (GDALDatasetH) poDS, nullptr,
                                pfnProgress, pProgressData ) != CE_None )
    {
        delete poDS;
        return nullptr;
    }

    // --------------------------------------------------------------------
    //      Finalize
    // --------------------------------------------------------------------

    poDS->FlushCache();

    return poDS;
}

/************************************************************************/
/*                            GetFileList()                             */
/************************************************************************/

char **IdrisiDataset::GetFileList()
{
    char **papszFileList = GDALPamDataset::GetFileList();

    // --------------------------------------------------------------------
    //      Symbol table file
    // --------------------------------------------------------------------

    const char *pszAssociated = CPLResetExtension( pszFilename, extSMP );

    if( FileExists( pszAssociated ) )
    {
        papszFileList = CSLAddString( papszFileList, pszAssociated );
    }
    else
    {
        pszAssociated = CPLResetExtension( pszFilename, extSMPu );

        if( FileExists( pszAssociated ) )
        {
            papszFileList = CSLAddString( papszFileList, pszAssociated );
        }
    }

    // --------------------------------------------------------------------
    //      Documentation file
    // --------------------------------------------------------------------

    pszAssociated = CPLResetExtension( pszFilename, extRDC );

    if( FileExists( pszAssociated ) )
    {
        papszFileList = CSLAddString( papszFileList, pszAssociated );
    }
    else
    {
        pszAssociated = CPLResetExtension( pszFilename, extRDCu );

        if( FileExists( pszAssociated ) )
        {
            papszFileList = CSLAddString( papszFileList, pszAssociated );
        }
    }

    // --------------------------------------------------------------------
    //      Reference file
    // --------------------------------------------------------------------

    pszAssociated = CPLResetExtension( pszFilename, extREF );

    if( FileExists( pszAssociated ) )
    {
        papszFileList = CSLAddString( papszFileList, pszAssociated );
    }
    else
    {
        pszAssociated = CPLResetExtension( pszFilename, extREFu );

        if( FileExists( pszAssociated ) )
        {
            papszFileList = CSLAddString( papszFileList, pszAssociated );
        }
    }

    return papszFileList;
}

/************************************************************************/
/*                          GetGeoTransform()                           */
/************************************************************************/

CPLErr  IdrisiDataset::GetGeoTransform( double * padfTransform )
{
    if( GDALPamDataset::GetGeoTransform( padfTransform ) != CE_None )
    {
        memcpy( padfTransform, adfGeoTransform, sizeof( double ) * 6 );
                /*
        if( adfGeoTransform[0] == 0.0
        &&  adfGeoTransform[1] == 1.0
        &&  adfGeoTransform[2] == 0.0
        &&  adfGeoTransform[3] == 0.0
        &&  adfGeoTransform[4] == 0.0
        &&  adfGeoTransform[5] == 1.0 )
            return CE_Failure;
                */
    }

    return CE_None;
}

/************************************************************************/
/*                          SetGeoTransform()                           */
/************************************************************************/

CPLErr  IdrisiDataset::SetGeoTransform( double * padfTransform )
{
    if( padfTransform[2] != 0.0 || padfTransform[4] != 0.0 )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
            "Attempt to set rotated geotransform on Idrisi Raster file.\n"
            "Idrisi Raster does not support rotation.\n" );
        return CE_Failure;
    }

    // --------------------------------------------------------------------
    // Update the .rdc file
    // --------------------------------------------------------------------

    double dfXPixSz = padfTransform[1];
    double dfYPixSz = padfTransform[5];
    double dfMinX = padfTransform[0];
    double dfMaxX = ( dfXPixSz * nRasterXSize ) + dfMinX;

    double dfMinY, dfMaxY;
    if( dfYPixSz < 0 )
    {
        dfMaxY   = padfTransform[3];
        dfMinY   = ( dfYPixSz * nRasterYSize ) + padfTransform[3];
    }
    else
    {
        dfMaxY   = ( dfYPixSz * nRasterYSize ) + padfTransform[3];
        dfMinY   = padfTransform[3];
    }

    papszRDC = CSLSetNameValue( papszRDC, rdcMIN_X,      CPLSPrintf( "%.7f", dfMinX ) );
    papszRDC = CSLSetNameValue( papszRDC, rdcMAX_X,      CPLSPrintf( "%.7f", dfMaxX ) );
    papszRDC = CSLSetNameValue( papszRDC, rdcMIN_Y,      CPLSPrintf( "%.7f", dfMinY ) );
    papszRDC = CSLSetNameValue( papszRDC, rdcMAX_Y,      CPLSPrintf( "%.7f", dfMaxY ) );
    papszRDC = CSLSetNameValue( papszRDC, rdcRESOLUTION, CPLSPrintf( "%.7f", fabs( dfYPixSz ) ) );

    // --------------------------------------------------------------------
    // Update the Dataset attribute
    // --------------------------------------------------------------------

    memcpy( adfGeoTransform, padfTransform, sizeof( double ) * 6 );

    return CE_None;
}

/************************************************************************/
/*                          GetProjectionRef()                          */
/************************************************************************/

const char *IdrisiDataset::GetProjectionRef( void )
{
    const char *pszPamSRS = GDALPamDataset::GetProjectionRef();

    if( pszPamSRS != nullptr && strlen( pszPamSRS ) > 0 )
        return pszPamSRS;

    if( pszProjection == nullptr )
    {
        const char *pszRefSystem = myCSLFetchNameValue( papszRDC, rdcREF_SYSTEM );
        const char *pszRefUnit = myCSLFetchNameValue( papszRDC, rdcREF_UNITS );

        if (pszRefSystem != nullptr && pszRefUnit != nullptr)
            IdrisiGeoReference2Wkt( pszFilename, pszRefSystem, pszRefUnit, &pszProjection );
        else
            pszProjection = CPLStrdup("");
    }
    return pszProjection;
}

/************************************************************************/
/*                           SetProjection()                            */
/************************************************************************/

CPLErr IdrisiDataset::SetProjection( const char *pszProjString )
{
    CPLFree( pszProjection );
    pszProjection = CPLStrdup( pszProjString );

    char *pszRefSystem = nullptr;
    char *pszRefUnit = nullptr;

    CPLErr eResult = Wkt2GeoReference( pszProjString, &pszRefSystem, &pszRefUnit );

    papszRDC = CSLSetNameValue( papszRDC, rdcREF_SYSTEM, pszRefSystem );
    papszRDC = CSLSetNameValue( papszRDC, rdcREF_UNITS,  pszRefUnit );

    CPLFree( pszRefSystem );
    CPLFree( pszRefUnit );

    return eResult;
}

/************************************************************************/
/*                          IdrisiRasterBand()                          */
/************************************************************************/

IdrisiRasterBand::IdrisiRasterBand( IdrisiDataset *poDSIn,
                                    int nBandIn,
                                    GDALDataType eDataTypeIn ) :
    poDefaultRAT(nullptr),
    nRecordSize(poDSIn->GetRasterXSize() * poDSIn->nBands *
                GDALGetDataTypeSizeBytes(eDataTypeIn)),
    pabyScanLine(static_cast<GByte *>(VSI_MALLOC2_VERBOSE(
        poDSIn->GetRasterXSize() * GDALGetDataTypeSizeBytes(eDataTypeIn),
        poDSIn->nBands))),
    fMaximum(0.0),
    fMinimum(0.0),
    bFirstVal(true)
{
    poDS = poDSIn;
    nBand = nBandIn;
    eDataType = eDataTypeIn;
    nBlockYSize = 1;
    nBlockXSize = poDS->GetRasterXSize();
}

/************************************************************************/
/*                         ~IdrisiRasterBand()                          */
/************************************************************************/

IdrisiRasterBand::~IdrisiRasterBand()
{
    CPLFree( pabyScanLine );

    if( poDefaultRAT )
    {
        delete poDefaultRAT;
    }
}

/************************************************************************/
/*                             IReadBlock()                             */
/************************************************************************/

CPLErr IdrisiRasterBand::IReadBlock( int nBlockXOff,
                                     int nBlockYOff,
                                     void *pImage )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if( VSIFSeekL( poGDS->fp,
        vsi_l_offset(nRecordSize) * nBlockYOff, SEEK_SET ) < 0 )
    {
        CPLError( CE_Failure, CPLE_FileIO,
            "Can't seek(%s) block with X offset %d and Y offset %d.\n%s",
            poGDS->pszFilename, nBlockXOff, nBlockYOff, VSIStrerror( errno ) );
        return CE_Failure;
    }

    if( (int) VSIFReadL( pabyScanLine, 1, nRecordSize, poGDS->fp ) < nRecordSize )
    {
        CPLError( CE_Failure, CPLE_FileIO,
            "Can't read(%s) block with X offset %d and Y offset %d.\n%s",
            poGDS->pszFilename, nBlockXOff, nBlockYOff, VSIStrerror( errno ) );
        return CE_Failure;
    }

    if( poGDS->nBands == 3 )
    {
        for( int i = 0, j = ( 3 - nBand ); i < nBlockXSize; i++, j += 3 )
        {
            ( (GByte*) pImage )[i] = pabyScanLine[j];
        }
    }
    else
    {
        memcpy( pImage, pabyScanLine, nRecordSize );
    }

#ifdef CPL_MSB
    if( eDataType == GDT_Float32 )
        GDALSwapWords( pImage, 4, nBlockXSize * nBlockYSize, 4 );
#endif

    return CE_None;
}

/************************************************************************/
/*                            IWriteBlock()                             */
/************************************************************************/

CPLErr IdrisiRasterBand::IWriteBlock( int nBlockXOff,
                                      int nBlockYOff,
                                      void *pImage )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

#ifdef CPL_MSB
    // Swap in input buffer if needed.
    if( eDataType == GDT_Float32 )
        GDALSwapWords( pImage, 4, nBlockXSize * nBlockYSize, 4 );
#endif

    if( poGDS->nBands == 1 )
    {
        memcpy( pabyScanLine, pImage, nRecordSize );
    }
    else
    {
        if( nBand > 1 )
        {
            VSIFSeekL( poGDS->fp,
                vsi_l_offset(nRecordSize) * nBlockYOff, SEEK_SET );
            VSIFReadL( pabyScanLine, 1, nRecordSize, poGDS->fp );
        }
        int i, j;
        for( i = 0, j = ( 3 - nBand ); i < nBlockXSize; i++, j += 3 )
        {
            pabyScanLine[j] = ( (GByte *) pImage )[i];
        }
    }

#ifdef CPL_MSB
    // Swap input buffer back to original form.
    if( eDataType == GDT_Float32 )
        GDALSwapWords( pImage, 4, nBlockXSize * nBlockYSize, 4 );
#endif

    VSIFSeekL( poGDS->fp, vsi_l_offset(nRecordSize) * nBlockYOff, SEEK_SET );

    if( (int) VSIFWriteL( pabyScanLine, 1, nRecordSize, poGDS->fp ) < nRecordSize )
    {
        CPLError( CE_Failure, CPLE_FileIO,
            "Can't write(%s) block with X offset %d and Y offset %d.\n%s",
            poGDS->pszFilename, nBlockXOff, nBlockYOff, VSIStrerror( errno ) );
        return CE_Failure;
    }

    int bHasNoDataValue = FALSE;
    float fNoDataValue = (float) GetNoDataValue(&bHasNoDataValue);

    // --------------------------------------------------------------------
    //      Search for the minimum and maximum values
    // --------------------------------------------------------------------

    if( eDataType == GDT_Float32 )
    {
        for( int i = 0; i < nBlockXSize; i++ )
        {
            float fVal = ((float*) pabyScanLine)[i]; //this is fine
            if( !bHasNoDataValue || fVal != fNoDataValue )
            {
                if( bFirstVal )
                {
                    fMinimum = fVal;
                    fMaximum = fVal;
                    bFirstVal = false;
                }
                else
                {
                    if( fVal < fMinimum) fMinimum = fVal;
                    if( fVal > fMaximum) fMaximum = fVal;
                }
            }
        }
    }
    else if( eDataType == GDT_Int16 )
    {
        for( int i = 0; i < nBlockXSize; i++ )
        {
            float fVal = (float) ((GInt16*) pabyScanLine)[i];
            if( !bHasNoDataValue || fVal != fNoDataValue )
            {
                if( bFirstVal )
                {
                    fMinimum = fVal;
                    fMaximum = fVal;
                    bFirstVal = false;
                }
                else
                {
                    if( fVal < fMinimum) fMinimum = fVal;
                    if( fVal > fMaximum) fMaximum = fVal;
                }
            }
        }
    }
    else if( poGDS->nBands == 1 )
    {
        for( int i = 0; i < nBlockXSize; i++ )
        {
            float fVal = (float) ((GByte*) pabyScanLine)[i];
            if( !bHasNoDataValue || fVal != fNoDataValue )
            {
                if( bFirstVal )
                {
                    fMinimum = fVal;
                    fMaximum = fVal;
                    bFirstVal = false;
                }
                else
                {
                    if( fVal < fMinimum) fMinimum = fVal;//I don't change this part, keep it as it is
                    if( fVal > fMaximum) fMaximum = fVal;
                }
            }
        }
    }
    else
    {
        for( int i = 0, j = ( 3 - nBand ); i < nBlockXSize; i++, j += 3 )
        {
            float fVal = (float) ((GByte*) pabyScanLine)[j];
            if( !bHasNoDataValue || fVal != fNoDataValue )
            {
                if( bFirstVal )
                {
                    fMinimum = fVal;
                    fMaximum = fVal;
                    bFirstVal = false;
                }
                else
                {
                    if( fVal < fMinimum) fMinimum = fVal;
                    if( fVal > fMaximum) fMaximum = fVal;
                }
            }
        }
    }

    return CE_None;
}

/************************************************************************/
/*                             GetMinimum()                             */
/************************************************************************/

double IdrisiRasterBand::GetMinimum( int *pbSuccess )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if (myCSLFetchNameValue( poGDS->papszRDC, rdcMIN_VALUE ) == nullptr)
        return GDALPamRasterBand::GetMinimum(pbSuccess);

    double adfMinValue[3];
    CPLsscanf( myCSLFetchNameValue( poGDS->papszRDC, rdcMIN_VALUE ), "%lf %lf %lf",
        &adfMinValue[0], &adfMinValue[1], &adfMinValue[2] );

    if( pbSuccess )
  {
        *pbSuccess = true;
  }

    return adfMinValue[this->nBand - 1];
}

/************************************************************************/
/*                             GetMaximum()                             */
/************************************************************************/

double IdrisiRasterBand::GetMaximum( int *pbSuccess )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if (myCSLFetchNameValue( poGDS->papszRDC, rdcMAX_VALUE ) == nullptr)
        return GDALPamRasterBand::GetMaximum(pbSuccess);

    double adfMaxValue[3];
    CPLsscanf( myCSLFetchNameValue( poGDS->papszRDC, rdcMAX_VALUE ), "%lf %lf %lf",
        &adfMaxValue[0], &adfMaxValue[1], &adfMaxValue[2] );

    if( pbSuccess )
    {
        *pbSuccess = true;
    }

    return adfMaxValue[this->nBand - 1];
}

/************************************************************************/
/*                           GetNoDataValue()                           */
/************************************************************************/

double IdrisiRasterBand::GetNoDataValue( int *pbSuccess )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    const char *pszFlagDefn = nullptr;

    if( myCSLFetchNameValue( poGDS->papszRDC, rdcFLAG_DEFN ) != nullptr )
        pszFlagDefn = myCSLFetchNameValue( poGDS->papszRDC, rdcFLAG_DEFN );
    else if( myCSLFetchNameValue( poGDS->papszRDC, rdcFLAG_DEFN2 ) != nullptr )
        pszFlagDefn = myCSLFetchNameValue( poGDS->papszRDC, rdcFLAG_DEFN2 );

    // ------------------------------------------------------------------------
    // If Flag_Def is not "none", Flag_Value means "background"
    // or "missing data"
    // ------------------------------------------------------------------------

    double dfNoData;
    if( pszFlagDefn != nullptr && ! EQUAL( pszFlagDefn, "none" ) )
    {
        dfNoData = CPLAtof_nz( myCSLFetchNameValue( poGDS->papszRDC, rdcFLAG_VALUE ) );
        if( pbSuccess )
            *pbSuccess = TRUE;
    }
    else
    {
        dfNoData = -9999.0;    /* this value should be ignored */
        if( pbSuccess )
            *pbSuccess = FALSE;
    }

    return dfNoData;
}

/************************************************************************/
/*                           SetNoDataValue()                           */
/************************************************************************/

CPLErr IdrisiRasterBand::SetNoDataValue( double dfNoDataValue )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    poGDS->papszRDC =
        CSLSetNameValue( poGDS->papszRDC, rdcFLAG_VALUE, CPLSPrintf( "%.7g", dfNoDataValue ) );
    poGDS->papszRDC =
        CSLSetNameValue( poGDS->papszRDC, rdcFLAG_DEFN,  "missing data" );

    return CE_None;
}

/************************************************************************/
/*                       GetColorInterpretation()                       */
/************************************************************************/

GDALColorInterp IdrisiRasterBand::GetColorInterpretation()
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if( poGDS->nBands == 3 )
    {
        switch( nBand )
        {
        case 1: return GCI_BlueBand;
        case 2: return GCI_GreenBand;
        case 3: return GCI_RedBand;
        }
    }
    else if( poGDS->poColorTable->GetColorEntryCount() > 0 )
    {
        return GCI_PaletteIndex;
    }
    return GCI_GrayIndex;
}

/************************************************************************/
/*                          GetCategoryNames()                          */
/************************************************************************/

char **IdrisiRasterBand::GetCategoryNames()
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    return poGDS->papszCategories;
}

/************************************************************************/
/*                          SetCategoryNames()                          */
/************************************************************************/

CPLErr IdrisiRasterBand::SetCategoryNames( char **papszCategoryNames )
{
    const int nCatCount = CSLCount( papszCategoryNames );

    if( nCatCount == 0 )
        return CE_None;

    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    CSLDestroy( poGDS->papszCategories );
    poGDS->papszCategories = CSLDuplicate( papszCategoryNames );

    // ------------------------------------------------------
    //        Search for the "Legend cats  : N" line
    // ------------------------------------------------------

    int nLine = -1;
    for( int i = 0;( i < CSLCount( poGDS->papszRDC ) ) &&( nLine == -1 ); i++ )
        if( EQUALN( poGDS->papszRDC[i], rdcLEGEND_CATS, 12 ) )
            nLine = i;

    if( nLine < 0 )
        return CE_None;

    int nCount = atoi_nz( myCSLFetchNameValue( poGDS->papszRDC, rdcLEGEND_CATS ) );

    // ------------------------------------------------------
    //        Delete old instance of the category names
    // ------------------------------------------------------

    if( nCount > 0 )
        poGDS->papszRDC = CSLRemoveStrings( poGDS->papszRDC, nLine + 1, nCount, nullptr );

    nCount = 0;

    for( int i = 0; i < nCatCount; i++ )
    {
        if( ( strlen( papszCategoryNames[i] ) > 0 ) )
        {
            poGDS->papszRDC = CSLInsertString( poGDS->papszRDC,( nLine + nCount + 1 ),
                CPLSPrintf( "%s:%s", CPLSPrintf( rdcCODE_N, i ), papszCategoryNames[i] ) );
            nCount++;
        }
    }

    poGDS->papszRDC = CSLSetNameValue( poGDS->papszRDC, rdcLEGEND_CATS, CPLSPrintf( "%d", nCount ) );//this is fine

    return CE_None;
}

/************************************************************************/
/*                           GetColorTable()                            */
/************************************************************************/

GDALColorTable *IdrisiRasterBand::GetColorTable()
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if( poGDS->poColorTable->GetColorEntryCount() == 0 )
    {
        return nullptr;
    }

    return poGDS->poColorTable;
}

/************************************************************************/
/*                           SetColorTable()                            */
/************************************************************************/

CPLErr IdrisiRasterBand::SetColorTable( GDALColorTable *poColorTable )
{
    if( poColorTable == nullptr )
    {
        return CE_None;
    }

    if( poColorTable->GetColorEntryCount() == 0 )
    {
        return CE_None;
    }

    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    delete poGDS->poColorTable;

    poGDS->poColorTable = poColorTable->Clone();

    const char *pszSMPFilename
        = CPLResetExtension( poGDS->pszFilename, extSMP );
    VSILFILE *fpSMP = VSIFOpenL( pszSMPFilename, "w" );

    if( fpSMP != nullptr )
    {
        VSIFWriteL( "[Idrisi]", 8, 1, fpSMP );
        GByte nPlatform = 1;    VSIFWriteL( &nPlatform, 1, 1, fpSMP );
        GByte nVersion = 11;    VSIFWriteL( &nVersion, 1, 1, fpSMP );
        GByte nDepth = 8;       VSIFWriteL( &nDepth, 1, 1, fpSMP );
        GByte nHeadSz = 18;     VSIFWriteL( &nHeadSz, 1, 1, fpSMP );
        GUInt16 nCount = 255;   VSIFWriteL( &nCount, 2, 1, fpSMP );
        GUInt16 nMix = 0;       VSIFWriteL( &nMix, 2, 1, fpSMP );
        GUInt16 nMax = 255;     VSIFWriteL( &nMax, 2, 1, fpSMP );

        GDALColorEntry oEntry;
        GByte aucRGB[3];

        for( int i = 0; i < poColorTable->GetColorEntryCount(); i++ )
        {
            poColorTable->GetColorEntryAsRGB( i, &oEntry );
            aucRGB[0] = (GByte) oEntry.c1;
            aucRGB[1] = (GByte) oEntry.c2;
            aucRGB[2] = (GByte) oEntry.c3;
            VSIFWriteL( &aucRGB, 3, 1, fpSMP );
        }
        /* smp files always have 256 occurrences. */
        for( int i = poColorTable->GetColorEntryCount(); i <= 255; i++ )
        {
            poColorTable->GetColorEntryAsRGB( i, &oEntry );
            aucRGB[0] = (GByte) 0;
            aucRGB[1] = (GByte) 0;
            aucRGB[2] = (GByte) 0;
            VSIFWriteL( &aucRGB, 3, 1, fpSMP );
        }
        VSIFCloseL( fpSMP );
    }

    return CE_None;
}

/************************************************************************/
/*                           GetUnitType()                              */
/************************************************************************/

const char *IdrisiRasterBand::GetUnitType()
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    return poGDS->pszUnitType;
}

/************************************************************************/
/*                            SetUnitType()                             */
/************************************************************************/

CPLErr IdrisiRasterBand::SetUnitType( const char *pszUnitType )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if( strlen( pszUnitType ) == 0 )
    {
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcVALUE_UNITS, "unspecified" );
    }
    else
    {
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcVALUE_UNITS, pszUnitType );
    }

    return CE_None;
}

/************************************************************************/
/*                             SetMinMax()                              */
/************************************************************************/

CPLErr IdrisiRasterBand::SetMinMax( double dfMin, double dfMax )
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    fMinimum = (float)dfMin;
    fMaximum = (float)dfMax;

    double adfMin[3] = {0.0, 0.0, 0.0};
    double adfMax[3] = {0.0, 0.0, 0.0};

    if (myCSLFetchNameValue( poGDS->papszRDC, rdcMIN_VALUE ) != nullptr)
        CPLsscanf( myCSLFetchNameValue( poGDS->papszRDC, rdcMIN_VALUE ), "%lf %lf %lf", &adfMin[0], &adfMin[1], &adfMin[2] );
    if (myCSLFetchNameValue( poGDS->papszRDC, rdcMAX_VALUE ) != nullptr)
        CPLsscanf( myCSLFetchNameValue( poGDS->papszRDC, rdcMAX_VALUE ), "%lf %lf %lf", &adfMax[0], &adfMax[1], &adfMax[2] );

    adfMin[nBand - 1] = dfMin;
    adfMax[nBand - 1] = dfMax;

    if( poGDS->nBands == 3 )
    {
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcMIN_VALUE,   CPLSPrintf( "%.8g %.8g %.8g", adfMin[0], adfMin[1], adfMin[2] ) );
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcMAX_VALUE,   CPLSPrintf( "%.8g %.8g %.8g", adfMax[0], adfMax[1], adfMax[2] ) );
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcDISPLAY_MIN, CPLSPrintf( "%.8g %.8g %.8g", adfMin[0], adfMin[1], adfMin[2] ) );
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcDISPLAY_MAX, CPLSPrintf( "%.8g %.8g %.8g", adfMax[0], adfMax[1], adfMax[2] ) );
    }
    else
    {
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcMIN_VALUE,   CPLSPrintf( "%.8g", adfMin[0] ) );
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcMAX_VALUE,   CPLSPrintf( "%.8g", adfMax[0] ) );
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcDISPLAY_MIN, CPLSPrintf( "%.8g", adfMin[0] ) );
        poGDS->papszRDC =
            CSLSetNameValue( poGDS->papszRDC, rdcDISPLAY_MAX, CPLSPrintf( "%.8g", adfMax[0] ) );
    }

    return CE_None;
}

/************************************************************************/
/*                           SetStatistics()                            */
/************************************************************************/

CPLErr IdrisiRasterBand::SetStatistics( double dfMin, double dfMax, double dfMean, double dfStdDev )
{
    SetMinMax(dfMin, dfMax);

    return GDALPamRasterBand::SetStatistics(dfMin, dfMax, dfMean, dfStdDev);
}

/************************************************************************/
/*                           SetDefaultRAT()                            */
/************************************************************************/

CPLErr IdrisiRasterBand::SetDefaultRAT( const GDALRasterAttributeTable *poRAT )
{
    if( ! poRAT )
    {
        return CE_Failure;
    }

    // ----------------------------------------------------------
    // Get field indecies
    // ----------------------------------------------------------

    int iValue = -1;
    int iRed   = poRAT->GetColOfUsage( GFU_Red );
    int iGreen = poRAT->GetColOfUsage( GFU_Green );
    int iBlue  = poRAT->GetColOfUsage( GFU_Blue );

    GDALColorTable *poCT = nullptr;
    char **papszNames = nullptr;

    int nFact  = 1;

    // ----------------------------------------------------------
    // Seek for "Value" field index (AGIS standards field name)
    // ----------------------------------------------------------

    if( GetColorTable() == nullptr || GetColorTable()->GetColorEntryCount() == 0 )
    {
        for( int i = 0; i < poRAT->GetColumnCount(); i++ )
        {
            if( STARTS_WITH_CI(poRAT->GetNameOfCol( i ), "Value") )
            {
                iValue = i;
                break;
            }
        }

        if( iRed != -1 && iGreen != -1 && iBlue != -1 )
        {
            poCT  = new GDALColorTable();
            nFact = poRAT->GetTypeOfCol( iRed ) == GFT_Real ? 255 : 1;
        }
    }

    // ----------------------------------------------------------
    // Seek for Name field index
    // ----------------------------------------------------------

    int iName  = -1;
    if( CSLCount( GetCategoryNames() ) == 0 )
    {
        iName  = poRAT->GetColOfUsage( GFU_Name );
        if( iName == -1 )
        {
            for( int i = 0; i < poRAT->GetColumnCount(); i++ )
            {
                if( STARTS_WITH_CI(poRAT->GetNameOfCol( i ), "Class_Name") )
                {
                    iName = i;
                    break;
                }
                else if( STARTS_WITH_CI(poRAT->GetNameOfCol( i ), "Categor") )
                {
                    iName = i;
                    break;
                }
                else if ( STARTS_WITH_CI(poRAT->GetNameOfCol( i ), "Name") )
                {
                    iName = i;
                    break;
                }
            }
        }

        /* if still can't find it use the first String column */

        if( iName == -1 )
        {
            for( int i = 0; i < poRAT->GetColumnCount(); i++ )
            {
                if( poRAT->GetTypeOfCol( i ) == GFT_String )
                {
                    iName = i;
                    break;
                }
            }
        }

        // ----------------------------------------------------------
        // Incomplete Attribute Table;
        // ----------------------------------------------------------

        if( iName == -1 )
        {
            iName = iValue;
        }
    }

    // ----------------------------------------------------------
    // Initialization
    // ----------------------------------------------------------

    double dRed     = 0.0;
    double dGreen   = 0.0;
    double dBlue    = 0.0;

    // ----------------------------------------------------------
    // Load values
    // ----------------------------------------------------------

    GDALColorEntry  sColor;
    int iEntry      = 0;
    int iOut        = 0;
    int nEntryCount = poRAT->GetRowCount();
    int nValue      = 0;

    if( iValue != -1 )
    {
        nValue = poRAT->GetValueAsInt( iEntry, iValue );
    }

    for( iOut = 0; iOut < 65535 && ( iEntry < nEntryCount ); iOut++ )
    {
        if( iOut == nValue )
        {
            if( poCT )
            {
                dRed    = poRAT->GetValueAsDouble( iEntry, iRed );
                dGreen  = poRAT->GetValueAsDouble( iEntry, iGreen );
                dBlue   = poRAT->GetValueAsDouble( iEntry, iBlue );
                sColor.c1  = (short) ( dRed   * nFact );
                sColor.c2  = (short) ( dGreen * nFact );
                sColor.c3  = (short) ( dBlue  * nFact );
                sColor.c4  = (short) ( 255    / nFact );
                poCT->SetColorEntry( iEntry, &sColor );
            }

            if( iName != -1 )
            {
                papszNames = CSLAddString( papszNames,
                    poRAT->GetValueAsString( iEntry, iName ) );
            }

            /* Advance on the table */

            if( ( ++iEntry ) < nEntryCount )
            {
                if( iValue != -1 )
                    nValue = poRAT->GetValueAsInt( iEntry, iValue );
                else
                    nValue = iEntry;
            }
        }
        else if( iOut < nValue )
        {
            if( poCT )
            {
                sColor.c1  = (short) 0;
                sColor.c2  = (short) 0;
                sColor.c3  = (short) 0;
                sColor.c4  = (short) 255;
                poCT->SetColorEntry( iEntry, &sColor );
            }

            if( iName != -1 )
                papszNames = CSLAddString( papszNames, "" );
        }
    }

    // ----------------------------------------------------------
    // Set Color Table
    // ----------------------------------------------------------

    if( poCT )
    {
        SetColorTable( poCT );
        delete poCT;
    }

    // ----------------------------------------------------------
    // Update Category Names
    // ----------------------------------------------------------

    if( papszNames )
    {
        SetCategoryNames( papszNames );
        CSLDestroy( papszNames );
    }

    // ----------------------------------------------------------
    // Update Attribute Table
    // ----------------------------------------------------------

    if( poDefaultRAT )
    {
        delete poDefaultRAT;
    }

    poDefaultRAT = poRAT->Clone();

    return CE_None;
}

/************************************************************************/
/*                           GetDefaultRAT()                            */
/************************************************************************/

GDALRasterAttributeTable *IdrisiRasterBand::GetDefaultRAT()
{
    IdrisiDataset *poGDS = (IdrisiDataset *) poDS;

    if( poGDS->papszCategories == nullptr )
    {
        return nullptr;
    }

    bool bHasColorTable = poGDS->poColorTable->GetColorEntryCount() > 0;

    // ----------------------------------------------------------
    // Create the bands Attribute Table
    // ----------------------------------------------------------

    if( poDefaultRAT )
    {
        delete poDefaultRAT;
    }

    poDefaultRAT = new GDALDefaultRasterAttributeTable();

    // ----------------------------------------------------------
    // Create (Value, Red, Green, Blue, Alpha, Class_Name) fields
    // ----------------------------------------------------------

    poDefaultRAT->CreateColumn( "Value",      GFT_Integer, GFU_Generic );
    poDefaultRAT->CreateColumn( "Value_1",    GFT_Integer, GFU_MinMax );

    if( bHasColorTable )
    {
        poDefaultRAT->CreateColumn( "Red",    GFT_Integer, GFU_Red );
        poDefaultRAT->CreateColumn( "Green",  GFT_Integer, GFU_Green );
        poDefaultRAT->CreateColumn( "Blue",   GFT_Integer, GFU_Blue );
        poDefaultRAT->CreateColumn( "Alpha",  GFT_Integer, GFU_Alpha );
    }
    poDefaultRAT->CreateColumn( "Class_name", GFT_String,  GFU_Name );

    // ----------------------------------------------------------
    // Loop through the Category Names.
    // ----------------------------------------------------------

    GDALColorEntry sEntry;
    int iName = poDefaultRAT->GetColOfUsage( GFU_Name );
    int nEntryCount = CSLCount( poGDS->papszCategories );
    int iRows = 0;

    for( int iEntry = 0; iEntry < nEntryCount; iEntry++ )
    {
        if( EQUAL( poGDS->papszCategories[iEntry], "" ) )
        {
            continue; // Eliminate the empty ones
        }
        poDefaultRAT->SetRowCount( poDefaultRAT->GetRowCount() + 1 );
        poDefaultRAT->SetValue( iRows, 0, iEntry );
        poDefaultRAT->SetValue( iRows, 1, iEntry );
        if( bHasColorTable )
        {
            poGDS->poColorTable->GetColorEntryAsRGB( iEntry, &sEntry );
            poDefaultRAT->SetValue( iRows, 2, sEntry.c1 );
            poDefaultRAT->SetValue( iRows, 3, sEntry.c2 );
            poDefaultRAT->SetValue( iRows, 4, sEntry.c3 );
            poDefaultRAT->SetValue( iRows, 5, sEntry.c4 );
        }
        poDefaultRAT->SetValue( iRows, iName, poGDS->papszCategories[iEntry] );
        iRows++;
    }

    return poDefaultRAT;
}

/************************************************************************/
/*                       IdrisiGeoReference2Wkt()                       */
/************************************************************************/

/***
* Converts Idrisi geographic reference information to OpenGIS WKT.
*
* The Idrisi metadata file contain two fields that describe the
* geographic reference, RefSystem and RefUnit.
*
* RefSystem can contains the world "plane" or the name of a georeference
* file <refsystem>.ref that details the geographic reference
* system( coordinate system and projection parameters ). RefUnits
* indicates the unit of the image bounds.
*
* The georeference files are generally located in the product installation
* folder $IDRISIDIR\Georef, but they are first looked for in the same
* folder as the data file.
*
* If a Reference system names can be recognized by a name convention
* it will be interpreted without the need to read the georeference file.
* That includes "latlong" and all the UTM and State Plane zones.
*
* RefSystem "latlong" means that the data is not project and the coordinate
* system is WGS84. RefSystem "plane" means that the there is no coordinate
* system but the it is possible to calculate areas and distance by looking
* at the RefUnits.
*
* If the environment variable IDRISIDIR is not set and the georeference file
* need to be read then the projection string will result as unknown.
***/

CPLErr IdrisiGeoReference2Wkt( const char* pszFilename,
                               const char *pszRefSystem,
                               const char *pszRefUnits,
                               char **ppszProjString )
{
    OGRSpatialReference oSRS;

    *ppszProjString = nullptr;

    // ---------------------------------------------------------
    //  Plane
    // ---------------------------------------------------------

    if( EQUAL( pszRefSystem, rstPLANE ) )
    {
        oSRS.SetLocalCS( "Plane" );
        int nUnit = GetUnitIndex( pszRefUnits );
        if( nUnit > -1 )
        {
            int nDeft = aoLinearUnitsConv[nUnit].nDefaultG;
            oSRS.SetLinearUnits( aoLinearUnitsConv[nDeft].pszName,
                aoLinearUnitsConv[nDeft].dfConv );
        }
        oSRS.exportToWkt( ppszProjString );
        return CE_None;
    }

    // ---------------------------------------------------------
    //  Latlong
    // ---------------------------------------------------------

    if( EQUAL( pszRefSystem, rstLATLONG  ) ||
        EQUAL( pszRefSystem, rstLATLONG2 ) )
    {
        oSRS.SetWellKnownGeogCS( "WGS84" );
        oSRS.exportToWkt( ppszProjString );
        return CE_None;
    }

    // ---------------------------------------------------------
    //  Prepare for scanning in lower case
    // ---------------------------------------------------------

    char *pszRefSystemLower = CPLStrdup( pszRefSystem );
    CPLStrlwr( pszRefSystemLower );

    // ---------------------------------------------------------
    //  UTM naming convention( ex.: utm-30n )
    // ---------------------------------------------------------

    if( EQUALN( pszRefSystem, rstUTM, 3 ) )
    {
        int    nZone;
        char cNorth;
        sscanf( pszRefSystemLower, rstUTM, &nZone, &cNorth );
        oSRS.SetWellKnownGeogCS( "WGS84" );
        oSRS.SetUTM( nZone,( cNorth == 'n' ) );
        oSRS.exportToWkt( ppszProjString );
        CPLFree( pszRefSystemLower );
        return CE_None;
    }

    // ---------------------------------------------------------
    //  State Plane naming convention( ex.: spc83ma1 )
    // ---------------------------------------------------------

    if( EQUALN( pszRefSystem, rstSPC, 3 ) )
    {
        int nNAD;
        int nZone;
        char szState[3];
        sscanf( pszRefSystemLower, rstSPC, &nNAD, szState, &nZone );
        int nSPCode = GetStateCode( szState );
        if( nSPCode != -1 )
        {
            nZone = ( nZone == 1 ? nSPCode : nSPCode + nZone - 1 );

            if( oSRS.SetStatePlane( nZone, ( nNAD == 83 ) ) != OGRERR_FAILURE )
            {
                oSRS.exportToWkt( ppszProjString );
                CPLFree( pszRefSystemLower );
                return CE_None;
            }

            // ----------------------------------------------------------
            //  If SetStatePlane fails, set GeoCS as NAD Datum and let it
            //  try to read the projection info from georeference file( * )
            // ----------------------------------------------------------

            oSRS.SetWellKnownGeogCS( CPLSPrintf( "NAD%d", nNAD ) );
        }
    }

    CPLFree( pszRefSystemLower );
    pszRefSystemLower = nullptr;

    // ------------------------------------------------------------------
    //  Search for georeference file <RefSystem>.ref
    // ------------------------------------------------------------------

    const char *pszFName = CPLSPrintf( "%s%c%s.ref",
        CPLGetDirname( pszFilename ), PATHDELIM,  pszRefSystem );

    if( ! FileExists( pszFName ) )
    {
        // ------------------------------------------------------------------
        //  Look at $IDRISIDIR\Georef\<RefSystem>.ref
        // ------------------------------------------------------------------

        const char *pszIdrisiDir = CPLGetConfigOption( "IDRISIDIR", nullptr );

        if( ( pszIdrisiDir ) != nullptr )
        {
            pszFName = CPLSPrintf( "%s%cgeoref%c%s.ref",
                pszIdrisiDir, PATHDELIM, PATHDELIM, pszRefSystem );
        }
    }

    // ------------------------------------------------------------------
    //  Cannot find georeference file
    // ------------------------------------------------------------------

    if( ! FileExists( pszFName ) )
    {
        CPLDebug( "RST", "Cannot find Idrisi georeference file %s",
            pszRefSystem );

        if( oSRS.IsGeographic() == FALSE ) /* see State Plane remarks( * ) */
        {
            oSRS.SetLocalCS( "Unknown" );
            int nUnit = GetUnitIndex( pszRefUnits );
            if( nUnit > -1 )
            {
                int nDeft = aoLinearUnitsConv[nUnit].nDefaultG;
                oSRS.SetLinearUnits( aoLinearUnitsConv[nDeft].pszName,
                    aoLinearUnitsConv[nDeft].dfConv );
            }
        }
        oSRS.exportToWkt( ppszProjString );
        return CE_Failure;
    }

    // ------------------------------------------------------------------
    //  Read values from georeference file
    // ------------------------------------------------------------------

    char **papszRef = CSLLoad( pszFName );
    myCSLSetNameValueSeparator( papszRef, ":" );

    char *pszGeorefName = nullptr;

    const char* pszREF_SYSTEM = myCSLFetchNameValue( papszRef, refREF_SYSTEM );
    if( pszREF_SYSTEM != nullptr && EQUAL( pszREF_SYSTEM, "" ) == FALSE )
    {
        pszGeorefName           = CPLStrdup( pszREF_SYSTEM );
    }
    else
    {
        pszGeorefName           = CPLStrdup( myCSLFetchNameValue( papszRef, refREF_SYSTEM2 ) );
    }
    char *pszProjName           = CPLStrdup( myCSLFetchNameValue( papszRef, refPROJECTION ) );
    char *pszDatum              = CPLStrdup( myCSLFetchNameValue( papszRef, refDATUM ) );
    char *pszEllipsoid          = CPLStrdup( myCSLFetchNameValue( papszRef, refELLIPSOID ) );
    const double dfCenterLat    = CPLAtof_nz( myCSLFetchNameValue( papszRef, refORIGIN_LAT ) );
    const double dfCenterLong   = CPLAtof_nz( myCSLFetchNameValue( papszRef, refORIGIN_LONG ) );
    const double dfSemiMajor    = CPLAtof_nz( myCSLFetchNameValue( papszRef, refMAJOR_SAX ) );
    const double dfSemiMinor    = CPLAtof_nz( myCSLFetchNameValue( papszRef, refMINOR_SAX ) );
    const double dfFalseEasting = CPLAtof_nz( myCSLFetchNameValue( papszRef, refORIGIN_X ) );
    const double dfFalseNorthing = CPLAtof_nz( myCSLFetchNameValue( papszRef, refORIGIN_Y ) );
    const double dfStdP1        = CPLAtof_nz( myCSLFetchNameValue( papszRef, refSTANDL_1 ) );
    const double dfStdP2        = CPLAtof_nz( myCSLFetchNameValue( papszRef, refSTANDL_2 ) );
    double dfScale;
    double adfToWGS84[3] = { 0.0, 0.0, 0.0 };

    const char* pszToWGS84 = myCSLFetchNameValue( papszRef, refDELTA_WGS84 );
    if (pszToWGS84)
        CPLsscanf( pszToWGS84, "%lf %lf %lf",
            &adfToWGS84[0], &adfToWGS84[1], &adfToWGS84[2] );

    const char* pszSCALE_FAC = myCSLFetchNameValue( papszRef, refSCALE_FAC );
    if( pszSCALE_FAC == nullptr || EQUAL( pszSCALE_FAC, "na" ) )
        dfScale = 1.0;
    else
        dfScale = CPLAtof_nz( pszSCALE_FAC );

    CSLDestroy( papszRef );

    // ----------------------------------------------------------------------
    //  Set the Geographic Coordinate System
    // ----------------------------------------------------------------------

    if( oSRS.IsGeographic() == FALSE ) /* see State Plane remarks(*) */
    {
        int nEPSG = 0;

        // ----------------------------------------------------------------------
        //  Is it a WGS84 equivalent?
        // ----------------------------------------------------------------------

        if( ( STARTS_WITH_CI(pszEllipsoid, "WGS") ) &&( strstr( pszEllipsoid, "84" ) ) &&
            ( STARTS_WITH_CI(pszDatum, "WGS") )     &&( strstr( pszDatum, "84" ) ) &&
            ( adfToWGS84[0] == 0.0 ) &&( adfToWGS84[1] == 0.0 ) &&( adfToWGS84[2] == 0.0 ) )
        {
            nEPSG = 4326;
        }

        // ----------------------------------------------------------------------
        //  Match GCS's DATUM_NAME by using 'ApproxString' over Datum
        // ----------------------------------------------------------------------

        if( nEPSG == 0 )
        {
            nEPSG = atoi_nz( CSVGetField( CSVFilename( "gcs.csv" ),
                "DATUM_NAME", pszDatum, CC_ApproxString, "COORD_REF_SYS_CODE" ) );
        }

        // ----------------------------------------------------------------------
        //  Match GCS's COORD_REF_SYS_NAME by using 'ApproxString' over Datum
        // ----------------------------------------------------------------------

        if( nEPSG == 0 )
        {
            nEPSG = atoi_nz( CSVGetField( CSVFilename( "gcs.csv" ),
                "COORD_REF_SYS_NAME", pszDatum, CC_ApproxString, "COORD_REF_SYS_CODE" ) );
        }

        if( nEPSG != 0 )
        {
            oSRS.importFromEPSG( nEPSG );
        }
        else
        {
            // --------------------------------------------------
            //  Create GeogCS based on the georeference file info
            // --------------------------------------------------

            oSRS.SetGeogCS( pszRefSystem,
                pszDatum,
                pszEllipsoid,
                dfSemiMajor,
                (dfSemiMinor == dfSemiMajor) ? 0.0 : ( -1.0 /( dfSemiMinor / dfSemiMajor - 1.0 ) ) );
        }

        // ----------------------------------------------------------------------
        //  Note: That will override EPSG info:
        // ----------------------------------------------------------------------

        oSRS.SetTOWGS84( adfToWGS84[0], adfToWGS84[1], adfToWGS84[2] );
    }

    // ----------------------------------------------------------------------
    //  If the georeference file tells that it is a non project system:
    // ----------------------------------------------------------------------

    if( EQUAL( pszProjName, "none" ) )
    {
        oSRS.exportToWkt( ppszProjString );

        CPLFree( pszGeorefName );
        CPLFree( pszProjName );
        CPLFree( pszDatum );
        CPLFree( pszEllipsoid );

        return CE_None;
    }

    // ----------------------------------------------------------------------
    //  Create Projection information based on georeference file info
    // ----------------------------------------------------------------------

    //  Idrisi user's Manual,   Supported Projection:
    //
    //      Mercator
    //      Transverse Mercator
    //      Gauss-Kruger
    //      Lambert Conformal Conic
    //      Plate Carree
    //      Hammer Aitoff
    //      Lambert North Polar Azimuthal Equal Area
    //      Lambert South Polar Azimuthal Equal Area
    //      Lambert Transverse Azimuthal Equal Area
    //      Lambert Oblique Polar Azimuthal Equal Area
    //      North Polar Stereographic
    //      South Polar Stereographic
    //      Transverse Stereographic
    //      Oblique Stereographic
    //      Albers Equal Area Conic
    //      Sinusoidal
    //

    if( EQUAL( pszProjName, "Mercator" ) )
    {
        oSRS.SetMercator( dfCenterLat, dfCenterLong, dfScale, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Transverse Mercator" ) )
    {
        oSRS.SetTM( dfCenterLat, dfCenterLong, dfScale, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Gauss-Kruger" ) )
    {
        oSRS.SetTM( dfCenterLat, dfCenterLong, dfScale, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Lambert Conformal Conic" ) )
    {
        oSRS.SetLCC( dfStdP1, dfStdP2, dfCenterLat, dfCenterLong, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Plate Carr" "\xE9" "e" ) ) /* 'eacute' in ISO-8859-1 */
    {
        oSRS.SetEquirectangular( dfCenterLat, dfCenterLong, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Hammer Aitoff" ) )
    {
        oSRS.SetProjection( pszProjName );
        oSRS.SetProjParm( SRS_PP_LATITUDE_OF_ORIGIN,  dfCenterLat );
        oSRS.SetProjParm( SRS_PP_CENTRAL_MERIDIAN,    dfCenterLong );
        oSRS.SetProjParm( SRS_PP_FALSE_EASTING,       dfFalseEasting );
        oSRS.SetProjParm( SRS_PP_FALSE_NORTHING,      dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Lambert North Polar Azimuthal Equal Area" ) ||
        EQUAL( pszProjName, "Lambert South Polar Azimuthal Equal Area" ) ||
        EQUAL( pszProjName, "Lambert Transverse Azimuthal Equal Area" ) ||
        EQUAL( pszProjName, "Lambert Oblique Polar Azimuthal Equal Area" ) )
    {
        oSRS.SetLAEA( dfCenterLat, dfCenterLong, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "North Polar Stereographic" ) ||
        EQUAL( pszProjName, "South Polar Stereographic" ) )
    {
        oSRS.SetPS( dfCenterLat, dfCenterLong, dfScale, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Transverse Stereographic" ) )
    {
        oSRS.SetStereographic( dfCenterLat, dfCenterLong, dfScale, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Oblique Stereographic" ) )
    {
        oSRS.SetOS( dfCenterLat, dfCenterLong, dfScale, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Alber's Equal Area Conic" ) ||
        EQUAL( pszProjName, "Albers Equal Area Conic" ) )
    {
        oSRS.SetACEA( dfStdP1, dfStdP2, dfCenterLat, dfCenterLong, dfFalseEasting, dfFalseNorthing );
    }
    else if( EQUAL( pszProjName, "Sinusoidal" ) )
    {
        oSRS.SetSinusoidal( dfCenterLong, dfFalseEasting, dfFalseNorthing );
    }
    else
    {
        CPLError( CE_Warning, CPLE_NotSupported,
            "Projection not listed on Idrisi User's Manual( v.15.0/2005 ).\n\t"
            "[\"%s\" in georeference file \"%s\"]",
            pszProjName, pszFName );
        oSRS.Clear();
        oSRS.exportToWkt( ppszProjString );

        CPLFree( pszGeorefName );
        CPLFree( pszProjName );
        CPLFree( pszDatum );
        CPLFree( pszEllipsoid );

        return CE_Warning;
    }

    // ----------------------------------------------------------------------
    //  Set the Linear Units
    // ----------------------------------------------------------------------

    int nUnit = GetUnitIndex( pszRefUnits );
    if( nUnit > -1 )
    {
        int nDeft = aoLinearUnitsConv[nUnit].nDefaultG;
        oSRS.SetLinearUnits( aoLinearUnitsConv[nDeft].pszName,
            aoLinearUnitsConv[nDeft].dfConv );
    }
    else
    {
        oSRS.SetLinearUnits( "unknown",  1.0 );
    }

    // ----------------------------------------------------------------------
    //  Name ProjCS with the name on the georeference file
    // ----------------------------------------------------------------------

    oSRS.SetProjCS( pszGeorefName );

    oSRS.exportToWkt( ppszProjString );

    CPLFree( pszGeorefName );
    CPLFree( pszProjName );
    CPLFree( pszDatum );
    CPLFree( pszEllipsoid );

    return CE_None;
}

/************************************************************************/
/*                        Wkt2GeoReference()                            */
/************************************************************************/

/***
* Converts OpenGIS WKT to Idrisi geographic reference information.
*
* That function will fill up the two parameters RefSystem and RefUnit
* that goes into the Idrisi metadata. But it could also create
* a accompanying georeference file to the output if necessary.
*
* First it will try to identify the ProjString as Local, WGS84 or
* one of the Idrisi name convention reference systems
* otherwise, if the projection system is supported by Idrisi,
* it will create a accompanying georeference files.
***/

CPLErr IdrisiDataset::Wkt2GeoReference( const char *pszProjString,
                                        char **pszRefSystem,
                                        char **pszRefUnit )
{
    // -----------------------------------------------------
    //  Plane with default "Meters"
    // -----------------------------------------------------

    if( EQUAL( pszProjString, "" ) )
            {
                *pszRefSystem = CPLStrdup( rstPLANE );
                *pszRefUnit   = CPLStrdup( rstMETER );
                return CE_None;
            }

    OGRSpatialReference oSRS;
    oSRS.importFromWkt( pszProjString );

    // -----------------------------------------------------
    //  Local => Plane + Linear Unit
    // -----------------------------------------------------

    if( oSRS.IsLocal() )
    {
        *pszRefSystem = CPLStrdup( rstPLANE );
        *pszRefUnit   = GetUnitDefault( oSRS.GetAttrValue( "UNIT" ),
                                        CPLSPrintf( "%f", oSRS.GetLinearUnits() ) );
        return CE_None;
    }

    // -----------------------------------------------------
    //  Test to identify WGS84 => Latlong + Angular Unit
    // -----------------------------------------------------

    if( oSRS.IsGeographic() )
    {
        char *pszSpheroid = CPLStrdup( oSRS.GetAttrValue( "SPHEROID" ) );
        char *pszAuthName = CPLStrdup( oSRS.GetAuthorityName( "GEOGCS" ) );
        char *pszDatum    = CPLStrdup( oSRS.GetAttrValue( "DATUM" ) );
        int nGCSCode = -1;
        if( EQUAL( pszAuthName, "EPSG" ) )
                {
                    nGCSCode = atoi( oSRS.GetAuthorityCode( "GEOGCS" ) );
                }
        if( ( nGCSCode == 4326 ) ||(
                ( STARTS_WITH_CI(pszSpheroid, "WGS") ) &&( strstr( pszSpheroid, "84" ) ) &&
                ( STARTS_WITH_CI(pszDatum, "WGS") )    &&( strstr( pszDatum, "84" ) ) ) )
        {
            *pszRefSystem = CPLStrdup( rstLATLONG );
            *pszRefUnit   = CPLStrdup( rstDEGREE );

            CPLFree( pszSpheroid );
            CPLFree( pszAuthName );
            CPLFree( pszDatum );

            return CE_None;
        }

        CPLFree( pszSpheroid );
        CPLFree( pszAuthName );
        CPLFree( pszDatum );
    }

    // -----------------------------------------------------
    //  Prepare to match some projections
    // -----------------------------------------------------

    const char *pszProjName = oSRS.GetAttrValue( "PROJECTION" );

    if( pszProjName == nullptr )
    {
        pszProjName = "";
    }

    // -----------------------------------------------------
    //  Check for UTM zones
    // -----------------------------------------------------

    if( EQUAL( pszProjName, SRS_PT_TRANSVERSE_MERCATOR ) )
    {
        int nZone = oSRS.GetUTMZone();

        if( ( nZone != 0 ) && ( EQUAL( oSRS.GetAttrValue( "DATUM" ), SRS_DN_WGS84 ) ) )
        {
            double dfNorth = oSRS.GetProjParm( SRS_PP_FALSE_NORTHING );
            *pszRefSystem  = CPLStrdup( CPLSPrintf( rstUTM, nZone,( dfNorth == 0.0 ? 'n' : 's' ) ) );
            *pszRefUnit    = CPLStrdup( rstMETER );
            return CE_None;
        }
    }

    // -----------------------------------------------------
    //  Check for State Plane
    // -----------------------------------------------------

#ifndef GDAL_RST_PLUGIN

    if( EQUAL( pszProjName, SRS_PT_LAMBERT_CONFORMAL_CONIC_2SP ) ||
        EQUAL( pszProjName, SRS_PT_TRANSVERSE_MERCATOR ) )
    {
        CPLString osPCSCode;
        const char *pszID = oSRS.GetAuthorityCode( "PROJCS" );
        if( pszID != nullptr && strlen( pszID ) > 0 )
        {
            const char* pszPCSCode = CSVGetField( CSVFilename( "stateplane.csv" ),
                                                 "EPSG_PCS_CODE", pszID, CC_Integer, "ID" );
            osPCSCode = (pszPCSCode) ? pszPCSCode : "";
            if( !osPCSCode.empty() )
            {
                int nZone      = osPCSCode.back() - '0';
                int nSPCode    = atoi( osPCSCode );

                if( nZone == 0 )
                    nZone = 1;
                else
                    nSPCode = nSPCode - nZone + 1;

                int nNADYear = 83;
                if( nSPCode > 10000 )
                {
                    nNADYear = 27;
                    nSPCode -= 10000;
                }
                char *pszState  = CPLStrdup( GetStateName( nSPCode ) );
                if( ! EQUAL( pszState, "" ) )
                {
                    *pszRefSystem   = CPLStrdup( CPLSPrintf( rstSPC, nNADYear, pszState, nZone ) );
                    *pszRefUnit     = GetUnitDefault( oSRS.GetAttrValue( "UNIT" ),
                                                      CPLSPrintf( "%f", oSRS.GetLinearUnits() ) );
                    CPLFree( pszState );
                    return CE_None;
                }
                CPLFree( pszState );
            }
        }//

        //if EPSG code is missing, go to following steps to work with origin
        double dfLon = 0.0;
        double dfLat = 0.0;

        const char *pszNAD83 = "83";
        const char *pszNAD27 = "27";
        bool bIsOldNAD = false;

        const char *pszDatumValue = oSRS.GetAttrValue("DATUM",0);
        if( (strstr(pszDatumValue, pszNAD83) == nullptr) && (strstr(pszDatumValue, pszNAD27) != nullptr ))
            //strcpy(pszNAD, "27");
            bIsOldNAD = true;

        if ( (oSRS.FindProjParm("central_meridian",nullptr) != -1) &&
             (oSRS.FindProjParm("latitude_of_origin",nullptr) != -1) )
        {
            dfLon = oSRS.GetProjParm("central_meridian");
            dfLat = oSRS.GetProjParm("latitude_of_origin");
            dfLon = (int)(fabs(dfLon) * 100 + 0.5) / 100.0;
            dfLat = (int)(fabs(dfLat) * 100 + 0.5) / 100.0;
            *pszRefSystem = CPLStrdup(GetSpcs(dfLon, dfLat));
        }

        if(*pszRefSystem != nullptr)
        {
            //Convert 83 TO 27
            if(bIsOldNAD)
            {
                char pszOutRefSystem[9];
                NAD83to27(pszOutRefSystem, *pszRefSystem);
                *pszRefSystem = CPLStrdup(pszOutRefSystem);
            }
            *pszRefUnit = GetUnitDefault( oSRS.GetAttrValue( "UNIT" ), CPLSPrintf( "%f", oSRS.GetLinearUnits() ) );
            return CE_None;
        }
    }

#endif // GDAL_RST_PLUGIN

    const char *pszProjectionOut = nullptr;

    if( oSRS.IsProjected() )
    {
        // ---------------------------------------------------------
        //  Check for supported projections
        // ---------------------------------------------------------

        if( EQUAL( pszProjName, SRS_PT_MERCATOR_1SP ) )
                {
                    pszProjectionOut =  "Mercator" ;
                }
        else if( EQUAL( pszProjName, SRS_PT_TRANSVERSE_MERCATOR ) )
                {
                    pszProjectionOut =  "Transverse Mercator" ;
                }
        else if( EQUAL( pszProjName, SRS_PT_LAMBERT_CONFORMAL_CONIC_2SP ) )
                     {
                         pszProjectionOut =  "Lambert Conformal Conic" ;
                     }
        else if( EQUAL( pszProjName, SRS_PT_EQUIRECTANGULAR ) )
                     {
                         pszProjectionOut =  "Plate Carr" "\xE9" "e" ; /* 'eacute' in ISO-8859-1 */
                     }
        else if( EQUAL( pszProjName, SRS_PT_LAMBERT_AZIMUTHAL_EQUAL_AREA ) )
                     {
                         double dfCenterLat = oSRS.GetProjParm( SRS_PP_LATITUDE_OF_ORIGIN, 0.0, nullptr );
                         if( dfCenterLat == 0.0 )
                             pszProjectionOut =  "Lambert Transverse Azimuthal Equal Area" ;
                         else if( fabs( dfCenterLat ) == 90.0 )
                             pszProjectionOut =  "Lambert Oblique Polar Azimuthal Equal Area" ;
                         else if( dfCenterLat > 0.0 )
                             pszProjectionOut =  "Lambert North Oblique Azimuthal Equal Area" ;
                         else
                             pszProjectionOut =  "Lambert South Oblique Azimuthal Equal Area" ;
                     }
        else if( EQUAL( pszProjName, SRS_PT_POLAR_STEREOGRAPHIC ) )
                     {
                         if( oSRS.GetProjParm( SRS_PP_LATITUDE_OF_ORIGIN, 0.0, nullptr ) > 0 )
                             pszProjectionOut =  "North Polar Stereographic" ;
                         else
                             pszProjectionOut =  "South Polar Stereographic" ;
                     }
        else if( EQUAL( pszProjName, SRS_PT_STEREOGRAPHIC ) )
                     {
                         pszProjectionOut =  "Transverse Stereographic" ;
                     }
        else if( EQUAL( pszProjName, SRS_PT_OBLIQUE_STEREOGRAPHIC ) )
                     {
                         pszProjectionOut =  "Oblique Stereographic" ;
                     }
        else if( EQUAL( pszProjName, SRS_PT_SINUSOIDAL ) )
                     {
                         pszProjectionOut =  "Sinusoidal" ;
                     }
        else if( EQUAL( pszProjName, SRS_PT_ALBERS_CONIC_EQUAL_AREA ) )
                     {
                         pszProjectionOut =  "Alber's Equal Area Conic" ;
                     }

        // ---------------------------------------------------------
        //  Failure, Projection system not suppotted
        // ---------------------------------------------------------

        if( pszProjectionOut == nullptr )
        {
            CPLDebug( "RST",
                      "Not supported by RST driver: PROJECTION[\"%s\"]",
                      pszProjName );

            *pszRefSystem = CPLStrdup( rstPLANE );
            *pszRefUnit   = CPLStrdup( rstMETER );
            return CE_Failure;
        }
    }
    else
    {
        pszProjectionOut =  "none" ;
    }

    // ---------------------------------------------------------
    //  Prepare to write ref file
    // ---------------------------------------------------------

    char *pszGeorefName         = CPLStrdup( "Unknown" );
    char *pszDatum              = CPLStrdup( oSRS.GetAttrValue( "DATUM" ) );
    char *pszEllipsoid          = CPLStrdup( oSRS.GetAttrValue( "SPHEROID" ) );
    double dfSemiMajor          = oSRS.GetSemiMajor();
    double dfSemiMinor          = oSRS.GetSemiMinor();
    double adfToWGS84[3];
    oSRS.GetTOWGS84( adfToWGS84, 3 );

    double dfCenterLat          = 0.0;
    double dfCenterLong         = 0.0;
    double dfFalseNorthing      = 0.0;
    double dfFalseEasting       = 0.0;
    double dfScale              = 1.0;
    int nParameters             = 0;
    double dfStdP1              = 0.0;
    double dfStdP2              = 0.0;
    char *pszAngularUnit        = CPLStrdup( oSRS.GetAttrValue( "GEOGCS|UNIT" ) );
    char *pszLinearUnit = nullptr;

    if( oSRS.IsProjected() )
    {
        CPLFree( pszGeorefName );
        pszGeorefName   = CPLStrdup( oSRS.GetAttrValue( "PROJCS" ) );
        dfCenterLat     = oSRS.GetProjParm( SRS_PP_LATITUDE_OF_ORIGIN, 0.0, nullptr );
        dfCenterLong    = oSRS.GetProjParm( SRS_PP_CENTRAL_MERIDIAN, 0.0, nullptr );
        dfFalseNorthing = oSRS.GetProjParm( SRS_PP_FALSE_NORTHING, 0.0, nullptr );
        dfFalseEasting  = oSRS.GetProjParm( SRS_PP_FALSE_EASTING, 0.0, nullptr );
        dfScale         = oSRS.GetProjParm( SRS_PP_SCALE_FACTOR, 0.0, nullptr );
        dfStdP1         = oSRS.GetProjParm( SRS_PP_STANDARD_PARALLEL_1, -0.1, nullptr );
        dfStdP2         = oSRS.GetProjParm( SRS_PP_STANDARD_PARALLEL_2, -0.1, nullptr );
        if( dfStdP1 != -0.1 )
        {
            nParameters = 1;
            if( dfStdP2 != -0.1 )
                nParameters = 2;
        }
        pszLinearUnit   = GetUnitDefault( oSRS.GetAttrValue( "PROJCS|UNIT" ),
                                          CPLSPrintf( "%f", oSRS.GetLinearUnits() ) ) ;
    }
    else
    {
        pszLinearUnit   = GetUnitDefault( pszAngularUnit );
    }

    // ---------------------------------------------------------
    //  Create a companion georeference file for this dataset
    // ---------------------------------------------------------

    char **papszRef = nullptr;
    papszRef = CSLAddNameValue( papszRef, refREF_SYSTEM,   pszGeorefName );
    papszRef = CSLAddNameValue( papszRef, refPROJECTION,   pszProjectionOut );
    papszRef = CSLAddNameValue( papszRef, refDATUM,        pszDatum );
    papszRef = CSLAddNameValue( papszRef, refDELTA_WGS84,  CPLSPrintf( "%.3g %.3g %.3g",
                                                                       adfToWGS84[0], adfToWGS84[1], adfToWGS84[2] ) );
    papszRef = CSLAddNameValue( papszRef, refELLIPSOID,    pszEllipsoid );
    papszRef = CSLAddNameValue( papszRef, refMAJOR_SAX,    CPLSPrintf( "%.3f", dfSemiMajor ) );
    papszRef = CSLAddNameValue( papszRef, refMINOR_SAX,    CPLSPrintf( "%.3f", dfSemiMinor ) );
    papszRef = CSLAddNameValue( papszRef, refORIGIN_LONG,  CPLSPrintf( "%.9g", dfCenterLong ) );
    papszRef = CSLAddNameValue( papszRef, refORIGIN_LAT,   CPLSPrintf( "%.9g", dfCenterLat ) );
    papszRef = CSLAddNameValue( papszRef, refORIGIN_X,     CPLSPrintf( "%.9g", dfFalseEasting ) );
    papszRef = CSLAddNameValue( papszRef, refORIGIN_Y,     CPLSPrintf( "%.9g", dfFalseNorthing ) );
    papszRef = CSLAddNameValue( papszRef, refSCALE_FAC,    CPLSPrintf( "%.9g", dfScale ) );
    papszRef = CSLAddNameValue( papszRef, refUNITS,        pszLinearUnit );
    papszRef = CSLAddNameValue( papszRef, refPARAMETERS,   CPLSPrintf( "%1d",  nParameters ) );
    if( nParameters > 0 )
        papszRef = CSLAddNameValue( papszRef, refSTANDL_1, CPLSPrintf( "%.9g", dfStdP1 ) );
    if( nParameters > 1 )
        papszRef = CSLAddNameValue( papszRef, refSTANDL_2, CPLSPrintf( "%.9g", dfStdP2 ) );
    myCSLSetNameValueSeparator( papszRef, ": " );
    SaveAsCRLF( papszRef, CPLResetExtension( pszFilename, extREF ) );
    CSLDestroy( papszRef );

    *pszRefSystem = CPLStrdup( CPLGetBasename( pszFilename ) );
    *pszRefUnit   = CPLStrdup( pszLinearUnit );

    CPLFree( pszGeorefName );
    CPLFree( pszDatum );
    CPLFree( pszEllipsoid );
    CPLFree( pszLinearUnit );
    CPLFree( pszAngularUnit );

    return CE_None;
}

/************************************************************************/
/*                             FileExists()                             */
/************************************************************************/

bool FileExists( const char *pszPath )
{
    VSIStatBufL  sStat;

    return VSIStatL( pszPath, &sStat ) == 0;
}

/************************************************************************/
/*                            GetStateCode()                            */
/************************************************************************/

int GetStateCode( const char *pszState )
{
    for( unsigned int i = 0; i < US_STATE_COUNT; i++ )
    {
        if( EQUAL( pszState, aoUSStateTable[i].pszName ) )
        {
            return aoUSStateTable[i].nCode;
        }
    }
    return -1;
}

/************************************************************************/
/*                            GetStateName()                            */
/************************************************************************/

const char *GetStateName( int nCode )
{
    for( unsigned int i = 0; i < US_STATE_COUNT; i++ )
    {
        if( nCode == aoUSStateTable[i].nCode )
        {
            return aoUSStateTable[i].pszName;
        }
    }
    return nullptr;
}

/************************************************************************/
/*                            GetSpcs()                                 */
/************************************************************************/

char *GetSpcs(double dfLon, double dfLat)
{
    for( int i=0; i<ORIGIN_COUNT; i++)
    {
        if(( dfLon == SPCS83Origin[i].longitude ) && ( dfLat == SPCS83Origin[i].latitude ))
        {
            return (char *)SPCS83Origin[i].spcs;
        }
    }
    return nullptr;
}

/************************************************************************/
/*                            NAD83to27()                               */
/************************************************************************/
void NAD83to27( char *pszOutRef, char *pszInRef)
{
    char *pOutput = pszOutRef;
    char *pInput = pszInRef;
    strncpy(pOutput, pInput, 3);

    pOutput = pOutput +3;
    pInput = pInput +3;

    memcpy(pOutput, "27", 2);
    pOutput = pOutput +2;
    pInput = pInput +2;
    strcpy(pOutput, pInput);
}

/************************************************************************/
/*                            GetUnitIndex()                            */
/************************************************************************/

int GetUnitIndex( const char *pszUnitName )
{
    for( int i = 0; i < (int) LINEAR_UNITS_COUNT; i++ )
    {
        if( EQUAL( pszUnitName, aoLinearUnitsConv[i].pszName ) )
        {
            return i;
        }
    }
    return -1;
}

/************************************************************************/
/*                            GetToMeterIndex()                         */
/************************************************************************/

int GetToMeterIndex( const char *pszToMeter )
{
    const double dfToMeter = CPLAtof_nz(pszToMeter);

    if( dfToMeter != 0.0 )
    {
        for( int i = 0; i < (int) LINEAR_UNITS_COUNT; i++ )
        {
            if ( std::abs( aoLinearUnitsConv[i].dfConv - dfToMeter ) < 0.00001 )
            {
                return i;
            }
        }
    }

    return -1;
}

/************************************************************************/
/*                            GetUnitDefault()                          */
/************************************************************************/

char *GetUnitDefault( const char *pszUnitName, const char *pszToMeter )
{
    int nIndex = GetUnitIndex( pszUnitName );

    if( nIndex == -1 && pszToMeter != nullptr )
    {
        nIndex = GetToMeterIndex( pszToMeter );
    }

    if( nIndex == -1 )
    {
        return CPLStrdup( "Unknown" );
    }

    return CPLStrdup( aoLinearUnitsConv[aoLinearUnitsConv[nIndex].nDefaultI].pszName );
}

/************************************************************************/
/*                               CSLSaveCRLF()                          */
/************************************************************************/

/***
 * Write a stringlist to a CR + LF terminated text file.
 *
 * Returns the number of lines written, or 0 if the file could not
 * be written.
 */

int  SaveAsCRLF(char **papszStrList, const char *pszFname)
{
    VSILFILE *fp = VSIFOpenL(pszFname, "wt");
    int     nLines = 0;

    if (papszStrList)
    {
        if (fp != nullptr)
        {
            while(*papszStrList != nullptr)
            {
                if( VSIFPrintfL( fp, "%s\r\n", *papszStrList ) < 1 )
                {
                    CPLError( CE_Failure, CPLE_FileIO,
                    "CSLSaveCRLF(\"%s\") failed: unable to write to output file.",
                              pszFname );
                    break;
                }

                nLines++;
                papszStrList++;
            }

            VSIFCloseL(fp);
        }
        else
        {
            CPLError( CE_Failure, CPLE_OpenFailed,
                      "CSLSaveCRLF(\"%s\") failed: unable to open output file.",
                      pszFname );
        }
    }

    return nLines;
}

/************************************************************************/
/*                        GDALRegister_IDRISI()                         */
/************************************************************************/

void GDALRegister_IDRISI()
{
    if( GDALGetDriverByName( "RST" ) != nullptr )
        return;

    GDALDriver *poDriver = new GDALDriver();

    poDriver->SetDescription( "RST" );
    poDriver->SetMetadataItem( GDAL_DCAP_RASTER, "YES" );
    poDriver->SetMetadataItem( GDAL_DMD_LONGNAME, rstVERSION );
    poDriver->SetMetadataItem( GDAL_DMD_HELPTOPIC, "frmt_Idrisi.html" );
    poDriver->SetMetadataItem( GDAL_DMD_EXTENSION, extRST );
    poDriver->SetMetadataItem( GDAL_DMD_CREATIONDATATYPES,
                               "Byte Int16 Float32" );

    poDriver->SetMetadataItem( GDAL_DCAP_VIRTUALIO, "YES" );

    poDriver->pfnOpen = IdrisiDataset::Open;
    poDriver->pfnCreate = IdrisiDataset::Create;
    poDriver->pfnCreateCopy = IdrisiDataset::CreateCopy;

    GetGDALDriverManager()->RegisterDriver( poDriver );
}
