/src/gdal/frmts/gtiff/libgeotiff/geo_extra.c

Source (jump to first uncovered line)
/******************************************************************************
 *
 * Project:  libgeotiff
 * Purpose:  Code to normalize a few common PCS values
 * Author:   Frank Warmerdam, warmerda@home.com
 *
 ******************************************************************************
 * Copyright (c) 1999, Frank Warmerdam
 *
 * SPDX-License-Identifier: MIT
 *****************************************************************************/

#include <stddef.h>

#include "geo_normalize.h"
#include "geovalues.h"

static const int StatePlaneTable[] =
{
    PCS_NAD83_Alabama_East,   Proj_Alabama_CS83_East,
    PCS_NAD83_Alabama_West,   Proj_Alabama_CS83_West,

    PCS_NAD83_Alaska_zone_1,    Proj_Alaska_CS83_1,
    PCS_NAD83_Alaska_zone_2,    Proj_Alaska_CS83_2,
    PCS_NAD83_Alaska_zone_3,    Proj_Alaska_CS83_3,
    PCS_NAD83_Alaska_zone_4,    Proj_Alaska_CS83_4,
    PCS_NAD83_Alaska_zone_5,    Proj_Alaska_CS83_5,
    PCS_NAD83_Alaska_zone_6,    Proj_Alaska_CS83_6,
    PCS_NAD83_Alaska_zone_7,    Proj_Alaska_CS83_7,
    PCS_NAD83_Alaska_zone_8,    Proj_Alaska_CS83_8,
    PCS_NAD83_Alaska_zone_9,    Proj_Alaska_CS83_9,
    PCS_NAD83_Alaska_zone_10,   Proj_Alaska_CS83_10,

    PCS_NAD83_California_1,   Proj_California_CS83_1,
    PCS_NAD83_California_2,   Proj_California_CS83_2,
    PCS_NAD83_California_3,   Proj_California_CS83_3,
    PCS_NAD83_California_4,   Proj_California_CS83_4,
    PCS_NAD83_California_5,   Proj_California_CS83_5,
    PCS_NAD83_California_6,   Proj_California_CS83_6,

    PCS_NAD83_Arizona_East,   Proj_Arizona_CS83_east,
    PCS_NAD83_Arizona_Central,    Proj_Arizona_CS83_Central,
    PCS_NAD83_Arizona_West,   Proj_Arizona_CS83_west,

    PCS_NAD83_Arkansas_North,   Proj_Arkansas_CS83_North,
    PCS_NAD83_Arkansas_South,   Proj_Arkansas_CS83_South,

    PCS_NAD83_Colorado_North,   Proj_Colorado_CS83_North,
    PCS_NAD83_Colorado_Central,   Proj_Colorado_CS83_Central,
    PCS_NAD83_Colorado_South,   Proj_Colorado_CS83_South,

    PCS_NAD83_Connecticut,    Proj_Connecticut_CS83,

    PCS_NAD83_Delaware,     Proj_Delaware_CS83,

    PCS_NAD83_Florida_East,   Proj_Florida_CS83_East,
    PCS_NAD83_Florida_North,    Proj_Florida_CS83_North,
    PCS_NAD83_Florida_West,   Proj_Florida_CS83_West,

    PCS_NAD83_Hawaii_zone_1,    Proj_Hawaii_CS83_1,
    PCS_NAD83_Hawaii_zone_2,    Proj_Hawaii_CS83_2,
    PCS_NAD83_Hawaii_zone_3,    Proj_Hawaii_CS83_3,
    PCS_NAD83_Hawaii_zone_4,    Proj_Hawaii_CS83_4,
    PCS_NAD83_Hawaii_zone_5,    Proj_Hawaii_CS83_5,

    PCS_NAD83_Georgia_East,   Proj_Georgia_CS83_East,
    PCS_NAD83_Georgia_West,   Proj_Georgia_CS83_West,

    PCS_NAD83_Idaho_East,   Proj_Idaho_CS83_East,
    PCS_NAD83_Idaho_Central,    Proj_Idaho_CS83_Central,
    PCS_NAD83_Idaho_West,   Proj_Idaho_CS83_West,

    PCS_NAD83_Illinois_East,    Proj_Illinois_CS83_East,
    PCS_NAD83_Illinois_West,    Proj_Illinois_CS83_West,

    PCS_NAD83_Indiana_East,   Proj_Indiana_CS83_East,
    PCS_NAD83_Indiana_West,   Proj_Indiana_CS83_West,

    PCS_NAD83_Iowa_North,         Proj_Iowa_CS83_North,
    PCS_NAD83_Iowa_South,         Proj_Iowa_CS83_South,

    PCS_NAD83_Kansas_North,   Proj_Kansas_CS83_North,
    PCS_NAD83_Kansas_South,   Proj_Kansas_CS83_South,

    PCS_NAD83_Kentucky_North,   Proj_Kentucky_CS83_North,
    PCS_NAD83_Kentucky_South,   Proj_Kentucky_CS83_South,

    PCS_NAD83_Louisiana_North,    Proj_Louisiana_CS83_North,
    PCS_NAD83_Louisiana_South,    Proj_Louisiana_CS83_South,

    PCS_NAD83_Maine_East,   Proj_Maine_CS83_East,
    PCS_NAD83_Maine_West,   Proj_Maine_CS83_West,

    PCS_NAD83_Maryland,     Proj_Maryland_CS83,

    PCS_NAD83_Massachusetts,    Proj_Massachusetts_CS83_Mainland,
    PCS_NAD83_Massachusetts_Is,   Proj_Massachusetts_CS83_Island,

    PCS_NAD83_Michigan_North,   Proj_Michigan_CS83_North,
    PCS_NAD83_Michigan_Central,   Proj_Michigan_CS83_Central,
    PCS_NAD83_Michigan_South,   Proj_Michigan_CS83_South,

    PCS_NAD83_Minnesota_North,    Proj_Minnesota_CS83_North,
    PCS_NAD83_Minnesota_Cent,   Proj_Minnesota_CS83_Central,
    PCS_NAD83_Minnesota_South,    Proj_Minnesota_CS83_South,

    PCS_NAD83_Mississippi_East,   Proj_Mississippi_CS83_East,
    PCS_NAD83_Mississippi_West,   Proj_Mississippi_CS83_West,

    PCS_NAD83_Missouri_East,    Proj_Missouri_CS83_East,
    PCS_NAD83_Missouri_Central,   Proj_Missouri_CS83_Central,
    PCS_NAD83_Missouri_West,    Proj_Missouri_CS83_West,

    PCS_NAD83_Montana,      Proj_Montana_CS83,

    PCS_NAD83_Nebraska,     Proj_Nebraska_CS83,

    PCS_NAD83_Nevada_East,    Proj_Nevada_CS83_East,
    PCS_NAD83_Nevada_Central,   Proj_Nevada_CS83_Central,
    PCS_NAD83_Nevada_West,    Proj_Nevada_CS83_West,

    PCS_NAD83_New_Hampshire,    Proj_New_Hampshire_CS83,

    PCS_NAD83_New_Jersey,   Proj_New_Jersey_CS83,

    PCS_NAD83_New_Mexico_East,    Proj_New_Mexico_CS83_East,
    PCS_NAD83_New_Mexico_Cent,    Proj_New_Mexico_CS83_Central,
    PCS_NAD83_New_Mexico_West,    Proj_New_Mexico_CS83_West,

    PCS_NAD83_New_York_East,    Proj_New_York_CS83_East,
    PCS_NAD83_New_York_Central,   Proj_New_York_CS83_Central,
    PCS_NAD83_New_York_West,    Proj_New_York_CS83_West,
    PCS_NAD83_New_York_Long_Is,   Proj_New_York_CS83_Long_Island,

    PCS_NAD83_North_Carolina,         Proj_North_Carolina_CS83,

    PCS_NAD83_North_Dakota_N,   Proj_North_Dakota_CS83_North,
    PCS_NAD83_North_Dakota_S,   Proj_North_Dakota_CS83_South,

    PCS_NAD83_Ohio_North,   Proj_Ohio_CS83_North,
    PCS_NAD83_Ohio_South,   Proj_Ohio_CS83_South,

    PCS_NAD83_Oklahoma_North,   Proj_Oklahoma_CS83_North,
    PCS_NAD83_Oklahoma_South,   Proj_Oklahoma_CS83_South,

    PCS_NAD83_Oregon_North,   Proj_Oregon_CS83_North,
    PCS_NAD83_Oregon_South,   Proj_Oregon_CS83_South,

    PCS_NAD83_Pennsylvania_N,   Proj_Pennsylvania_CS83_North,
    PCS_NAD83_Pennsylvania_S,   Proj_Pennsylvania_CS83_South,

    PCS_NAD83_Rhode_Island,   Proj_Rhode_Island_CS83,

    PCS_NAD83_South_Carolina,   Proj_South_Carolina_CS83,

    PCS_NAD83_South_Dakota_N,   Proj_South_Dakota_CS83_North,
    PCS_NAD83_South_Dakota_S,   Proj_South_Dakota_CS83_South,

    PCS_NAD83_Tennessee,    Proj_Tennessee_CS83,

    PCS_NAD83_Texas_North,    Proj_Texas_CS83_North,
    PCS_NAD83_Texas_North_Cen,    Proj_Texas_CS83_North_Central,
    PCS_NAD83_Texas_Central,    Proj_Texas_CS83_Central,
    PCS_NAD83_Texas_South_Cen,    Proj_Texas_CS83_South_Central,
    PCS_NAD83_Texas_South,    Proj_Texas_CS83_South,

    PCS_NAD83_Utah_North,   Proj_Utah_CS83_North,
    PCS_NAD83_Utah_Central,   Proj_Utah_CS83_Central,
    PCS_NAD83_Utah_South,   Proj_Utah_CS83_South,

    PCS_NAD83_Vermont,      Proj_Vermont_CS83,

    PCS_NAD83_Virginia_North,   Proj_Virginia_CS83_North,
    PCS_NAD83_Virginia_South,   Proj_Virginia_CS83_South,

    PCS_NAD83_Washington_North,   Proj_Washington_CS83_North,
    PCS_NAD83_Washington_South,   Proj_Washington_CS83_South,

    PCS_NAD83_West_Virginia_N,    Proj_West_Virginia_CS83_North,
    PCS_NAD83_West_Virginia_S,    Proj_West_Virginia_CS83_South,

    PCS_NAD83_Wisconsin_North,    Proj_Wisconsin_CS83_North,
    PCS_NAD83_Wisconsin_Cen,    Proj_Wisconsin_CS83_Central,
    PCS_NAD83_Wisconsin_South,    Proj_Wisconsin_CS83_South,

    PCS_NAD83_Wyoming_East,   Proj_Wyoming_CS83_East,
    PCS_NAD83_Wyoming_E_Cen,    Proj_Wyoming_CS83_East_Central,
    PCS_NAD83_Wyoming_W_Cen,    Proj_Wyoming_CS83_West_Central,
    PCS_NAD83_Wyoming_West,   Proj_Wyoming_CS83_West,

    PCS_NAD83_Puerto_Rico_Virgin_Is,  Proj_Puerto_Rico_Virgin_Is,

    PCS_NAD27_Alabama_East,   Proj_Alabama_CS27_East,
    PCS_NAD27_Alabama_West,   Proj_Alabama_CS27_West,

    PCS_NAD27_Alaska_zone_1,    Proj_Alaska_CS27_1,
    PCS_NAD27_Alaska_zone_2,    Proj_Alaska_CS27_2,
    PCS_NAD27_Alaska_zone_3,    Proj_Alaska_CS27_3,
    PCS_NAD27_Alaska_zone_4,    Proj_Alaska_CS27_4,
    PCS_NAD27_Alaska_zone_5,    Proj_Alaska_CS27_5,
    PCS_NAD27_Alaska_zone_6,    Proj_Alaska_CS27_6,
    PCS_NAD27_Alaska_zone_7,    Proj_Alaska_CS27_7,
    PCS_NAD27_Alaska_zone_8,    Proj_Alaska_CS27_8,
    PCS_NAD27_Alaska_zone_9,    Proj_Alaska_CS27_9,
    PCS_NAD27_Alaska_zone_10,   Proj_Alaska_CS27_10,

    PCS_NAD27_California_I,   Proj_California_CS27_I,
    PCS_NAD27_California_II,    Proj_California_CS27_II,
    PCS_NAD27_California_III,   Proj_California_CS27_III,
    PCS_NAD27_California_IV,    Proj_California_CS27_IV,
    PCS_NAD27_California_V,   Proj_California_CS27_V,
    PCS_NAD27_California_VI,    Proj_California_CS27_VI,
    PCS_NAD27_California_VII,   Proj_California_CS27_VII,

    PCS_NAD27_Arizona_East,   Proj_Arizona_Coordinate_System_east,
    PCS_NAD27_Arizona_Central,    Proj_Arizona_Coordinate_System_Central,
    PCS_NAD27_Arizona_West,   Proj_Arizona_Coordinate_System_west,

    PCS_NAD27_Arkansas_North,   Proj_Arkansas_CS27_North,
    PCS_NAD27_Arkansas_South,   Proj_Arkansas_CS27_South,

    PCS_NAD27_Colorado_North,   Proj_Colorado_CS27_North,
    PCS_NAD27_Colorado_Central,   Proj_Colorado_CS27_Central,
    PCS_NAD27_Colorado_South,   Proj_Colorado_CS27_South,

    PCS_NAD27_Connecticut,    Proj_Connecticut_CS27,

    PCS_NAD27_Delaware,     Proj_Delaware_CS27,

    PCS_NAD27_Florida_East,   Proj_Florida_CS27_East,
    PCS_NAD27_Florida_North,    Proj_Florida_CS27_North,
    PCS_NAD27_Florida_West,   Proj_Florida_CS27_West,

    PCS_NAD27_Hawaii_zone_1,    Proj_Hawaii_CS27_1,
    PCS_NAD27_Hawaii_zone_2,    Proj_Hawaii_CS27_2,
    PCS_NAD27_Hawaii_zone_3,    Proj_Hawaii_CS27_3,
    PCS_NAD27_Hawaii_zone_4,    Proj_Hawaii_CS27_4,
    PCS_NAD27_Hawaii_zone_5,    Proj_Hawaii_CS27_5,

    PCS_NAD27_Georgia_East,   Proj_Georgia_CS27_East,
    PCS_NAD27_Georgia_West,   Proj_Georgia_CS27_West,

    PCS_NAD27_Idaho_East,   Proj_Idaho_CS27_East,
    PCS_NAD27_Idaho_Central,    Proj_Idaho_CS27_Central,
    PCS_NAD27_Idaho_West,   Proj_Idaho_CS27_West,

    PCS_NAD27_Illinois_East,    Proj_Illinois_CS27_East,
    PCS_NAD27_Illinois_West,    Proj_Illinois_CS27_West,

    PCS_NAD27_Indiana_East,   Proj_Indiana_CS27_East,
    PCS_NAD27_Indiana_West,   Proj_Indiana_CS27_West,

    PCS_NAD27_Iowa_North,         Proj_Iowa_CS27_North,
    PCS_NAD27_Iowa_South,         Proj_Iowa_CS27_South,

    PCS_NAD27_Kansas_North,   Proj_Kansas_CS27_North,
    PCS_NAD27_Kansas_South,   Proj_Kansas_CS27_South,

    PCS_NAD27_Kentucky_North,   Proj_Kentucky_CS27_North,
    PCS_NAD27_Kentucky_South,   Proj_Kentucky_CS27_South,

    PCS_NAD27_Louisiana_North,    Proj_Louisiana_CS27_North,
    PCS_NAD27_Louisiana_South,    Proj_Louisiana_CS27_South,

    PCS_NAD27_Maine_East,   Proj_Maine_CS27_East,
    PCS_NAD27_Maine_West,   Proj_Maine_CS27_West,

    PCS_NAD27_Maryland,     Proj_Maryland_CS27,

    PCS_NAD27_Massachusetts,    Proj_Massachusetts_CS27_Mainland,
    PCS_NAD27_Massachusetts_Is,   Proj_Massachusetts_CS27_Island,

    PCS_NAD27_Michigan_North,   Proj_Michigan_CS27_North,
    PCS_NAD27_Michigan_Central,   Proj_Michigan_CS27_Central,
    PCS_NAD27_Michigan_South,   Proj_Michigan_CS27_South,

    PCS_NAD27_Minnesota_North,    Proj_Minnesota_CS27_North,
    PCS_NAD27_Minnesota_Cent,   Proj_Minnesota_CS27_Central,
    PCS_NAD27_Minnesota_South,    Proj_Minnesota_CS27_South,

    PCS_NAD27_Mississippi_East,   Proj_Mississippi_CS27_East,
    PCS_NAD27_Mississippi_West,   Proj_Mississippi_CS27_West,

    PCS_NAD27_Missouri_East,    Proj_Missouri_CS27_East,
    PCS_NAD27_Missouri_Central,   Proj_Missouri_CS27_Central,
    PCS_NAD27_Missouri_West,    Proj_Missouri_CS27_West,

    PCS_NAD27_Montana_North,    Proj_Montana_CS27_North,
    PCS_NAD27_Montana_Central,    Proj_Montana_CS27_Central,
    PCS_NAD27_Montana_South,    Proj_Montana_CS27_South,

    PCS_NAD27_Nebraska_North,   Proj_Nebraska_CS27_North,
    PCS_NAD27_Nebraska_South,   Proj_Nebraska_CS27_South,

    PCS_NAD27_Nevada_East,    Proj_Nevada_CS27_East,
    PCS_NAD27_Nevada_Central,   Proj_Nevada_CS27_Central,
    PCS_NAD27_Nevada_West,    Proj_Nevada_CS27_West,

    PCS_NAD27_New_Hampshire,    Proj_New_Hampshire_CS27,

    PCS_NAD27_New_Jersey,   Proj_New_Jersey_CS27,

    PCS_NAD27_New_Mexico_East,    Proj_New_Mexico_CS27_East,
    PCS_NAD27_New_Mexico_Cent,    Proj_New_Mexico_CS27_Central,
    PCS_NAD27_New_Mexico_West,    Proj_New_Mexico_CS27_West,

    PCS_NAD27_New_York_East,    Proj_New_York_CS27_East,
    PCS_NAD27_New_York_Central,   Proj_New_York_CS27_Central,
    PCS_NAD27_New_York_West,    Proj_New_York_CS27_West,
    PCS_NAD27_New_York_Long_Is,   Proj_New_York_CS27_Long_Island,

    PCS_NAD27_North_Carolina,         Proj_North_Carolina_CS27,

    PCS_NAD27_North_Dakota_N,   Proj_North_Dakota_CS27_North,
    PCS_NAD27_North_Dakota_S,   Proj_North_Dakota_CS27_South,

    PCS_NAD27_Ohio_North,   Proj_Ohio_CS27_North,
    PCS_NAD27_Ohio_South,   Proj_Ohio_CS27_South,

    PCS_NAD27_Oklahoma_North,   Proj_Oklahoma_CS27_North,
    PCS_NAD27_Oklahoma_South,   Proj_Oklahoma_CS27_South,

    PCS_NAD27_Oregon_North,   Proj_Oregon_CS27_North,
    PCS_NAD27_Oregon_South,   Proj_Oregon_CS27_South,

    PCS_NAD27_Pennsylvania_N,   Proj_Pennsylvania_CS27_North,
    PCS_NAD27_Pennsylvania_S,   Proj_Pennsylvania_CS27_South,

    PCS_NAD27_Rhode_Island,   Proj_Rhode_Island_CS27,

    PCS_NAD27_South_Carolina_N,   Proj_South_Carolina_CS27_North,
    PCS_NAD27_South_Carolina_S,   Proj_South_Carolina_CS27_South,

    PCS_NAD27_South_Dakota_N,   Proj_South_Dakota_CS27_North,
    PCS_NAD27_South_Dakota_S,   Proj_South_Dakota_CS27_South,

    PCS_NAD27_Tennessee,    Proj_Tennessee_CS27,

    PCS_NAD27_Texas_North,    Proj_Texas_CS27_North,
    PCS_NAD27_Texas_North_Cen,    Proj_Texas_CS27_North_Central,
    PCS_NAD27_Texas_Central,    Proj_Texas_CS27_Central,
    PCS_NAD27_Texas_South_Cen,    Proj_Texas_CS27_South_Central,
    PCS_NAD27_Texas_South,    Proj_Texas_CS27_South,

    PCS_NAD27_Utah_North,   Proj_Utah_CS27_North,
    PCS_NAD27_Utah_Central,   Proj_Utah_CS27_Central,
    PCS_NAD27_Utah_South,   Proj_Utah_CS27_South,

    PCS_NAD27_Vermont,      Proj_Vermont_CS27,

    PCS_NAD27_Virginia_North,   Proj_Virginia_CS27_North,
    PCS_NAD27_Virginia_South,   Proj_Virginia_CS27_South,

    PCS_NAD27_Washington_North,   Proj_Washington_CS27_North,
    PCS_NAD27_Washington_South,   Proj_Washington_CS27_South,

    PCS_NAD27_West_Virginia_N,    Proj_West_Virginia_CS27_North,
    PCS_NAD27_West_Virginia_S,    Proj_West_Virginia_CS27_South,

    PCS_NAD27_Wisconsin_North,    Proj_Wisconsin_CS27_North,
    PCS_NAD27_Wisconsin_Cen,    Proj_Wisconsin_CS27_Central,
    PCS_NAD27_Wisconsin_South,    Proj_Wisconsin_CS27_South,

    PCS_NAD27_Wyoming_East,   Proj_Wyoming_CS27_East,
    PCS_NAD27_Wyoming_E_Cen,    Proj_Wyoming_CS27_East_Central,
    PCS_NAD27_Wyoming_W_Cen,    Proj_Wyoming_CS27_West_Central,
    PCS_NAD27_Wyoming_West,   Proj_Wyoming_CS27_West,

    PCS_NAD27_Puerto_Rico,    Proj_Puerto_Rico_CS27,

    KvUserDefined
};

/************************************************************************/
/*                          GTIFMapSysToPCS()                           */
/*                                                                      */
/*      Given a Datum, MapSys and zone value generate the best PCS      */
/*      code possible.                                                  */
/************************************************************************/

int GTIFMapSysToPCS( int MapSys, int Datum, int nZone )

{
    int   PCSCode = KvUserDefined;

    if( MapSys == MapSys_UTM_North )
    {
  if( Datum == GCS_NAD27 )
      PCSCode = PCS_NAD27_UTM_zone_3N + nZone - 3;
  else if( Datum == GCS_NAD83 )
      PCSCode = PCS_NAD83_UTM_zone_3N + nZone - 3;
  else if( Datum == GCS_WGS_72 )
      PCSCode = PCS_WGS72_UTM_zone_1N + nZone - 1;
  else if( Datum == GCS_WGS_72BE )
      PCSCode = PCS_WGS72BE_UTM_zone_1N + nZone - 1;
  else if( Datum == GCS_WGS_84 )
      PCSCode = PCS_WGS84_UTM_zone_1N + nZone - 1;
    }
    else if( MapSys == MapSys_UTM_South )
    {
  if( Datum == GCS_WGS_72 )
      PCSCode = PCS_WGS72_UTM_zone_1S + nZone - 1;
  else if( Datum == GCS_WGS_72BE )
      PCSCode = PCS_WGS72BE_UTM_zone_1S + nZone - 1;
  else if( Datum == GCS_WGS_84 )
      PCSCode = PCS_WGS84_UTM_zone_1S + nZone - 1;
    }
    else if( MapSys == MapSys_State_Plane_27 )
    {
        PCSCode = 10000 + nZone;
  for( int i = 0; StatePlaneTable[i] != KvUserDefined; i += 2 )
  {
      if( StatePlaneTable[i+1] == PCSCode )
          PCSCode = StatePlaneTable[i];
  }

        /* Old EPSG code was in error for Tennesse CS27, override */
        if( nZone == 4100 )
            PCSCode = 2204;
    }
    else if( MapSys == MapSys_State_Plane_83 )
    {
        PCSCode = 10000 + nZone + 30;

  for( int i = 0; StatePlaneTable[i] != KvUserDefined; i += 2 )
  {
      if( StatePlaneTable[i+1] == PCSCode )
          PCSCode = StatePlaneTable[i];
  }

        /* Old EPSG code was in error for Kentucky North CS83, override */
        if( nZone == 1601 )
            PCSCode = 2205;
    }

    return PCSCode;
}

/************************************************************************/
/*                          GTIFMapSysToProj()                          */
/*                                                                      */
/*      Given a MapSys and zone value generate the best Proj_           */
/*      code possible.                                                  */
/************************************************************************/

int GTIFMapSysToProj( int MapSys, int nZone )

{
    int   ProjCode = KvUserDefined;

    if( MapSys == MapSys_UTM_North )
    {
        ProjCode = Proj_UTM_zone_1N + nZone - 1;
    }
    else if( MapSys == MapSys_UTM_South )
    {
        ProjCode = Proj_UTM_zone_1S + nZone - 1;
    }
    else if( MapSys == MapSys_State_Plane_27 )
    {
        ProjCode = 10000 + nZone;

        /* Tennesse override */
        if( nZone == 4100 )
            ProjCode = 15302;
    }
    else if( MapSys == MapSys_State_Plane_83 )
    {
        ProjCode = 10000 + nZone + 30;

        /* Kentucky North override */
        if( nZone == 1601 )
            ProjCode = 15303;
    }

    return ProjCode;
}

/************************************************************************/
/*                          GTIFPCSToMapSys()                           */
/************************************************************************/

/**
 * Translate a PCS_ code into a UTM or State Plane map system, a datum,
 * and a zone if possible.
 *
 * @param PCSCode The projection code (PCS_*) as would be stored in the
 * ProjectedCSTypeGeoKey of a GeoTIFF file.
 *
 * @param pDatum Pointer to an integer into which the datum code (GCS_*)
 * is put if the function succeeds.
 *
 * @param pZone Pointer to an integer into which the zone will be placed
 * if the function is successful.
 *
 * @return Returns either MapSys_UTM_North, MapSys_UTM_South,
 * MapSys_State_Plane_83, MapSys_State_Plane_27 or KvUserDefined.
 * KvUserDefined indicates that the
 * function failed to recognise the projection as UTM or State Plane.
 *
 * The zone value is only set if the return code is other than KvUserDefined.
 * For utm map system the returned zone will be between 1 and 60.  For
 * State Plane, the USGS state plane zone number is returned.  For instance,
 * Alabama East is zone 101.
 *
 * The datum (really this is the GCS) is set to a GCS_ value such as GCS_NAD27.
 *
 * This function is useful to recognise (most) UTM and State Plane coordinate
 * systems.
 * It is used as a fallback mechanism by GTIFGetDefn() for normalization when
 * PROJ database is not found.
 */

int GTIFPCSToMapSys( int PCSCode, int * pDatum, int * pZone )

{
    int   Datum = KvUserDefined, Proj = KvUserDefined;
    int   nZone = KvUserDefined;

/* -------------------------------------------------------------------- */
/*      UTM with various datums.  Note there are lots of PCS UTM        */
/*      codes not done yet which use strange datums.                    */
/* -------------------------------------------------------------------- */
    if( PCSCode >= PCS_NAD27_UTM_zone_3N && PCSCode <= PCS_NAD27_UTM_zone_22N )
    {
  Datum = GCS_NAD27;
  Proj = MapSys_UTM_North;
  nZone = PCSCode - PCS_NAD27_UTM_zone_3N + 3;
    }
    else if( PCSCode >= PCS_NAD83_UTM_zone_3N
       && PCSCode <= PCS_NAD83_UTM_zone_23N )
    {
  Datum = GCS_NAD83;
  Proj = MapSys_UTM_North;
  nZone = PCSCode - PCS_NAD83_UTM_zone_3N + 3;
    }

    else if( PCSCode >= PCS_WGS72_UTM_zone_1N
       && PCSCode <= PCS_WGS72_UTM_zone_60N )
    {
  Datum = GCS_WGS_72;
  Proj = MapSys_UTM_North;
  nZone = PCSCode - PCS_WGS72_UTM_zone_1N + 1;
    }
    else if( PCSCode >= PCS_WGS72_UTM_zone_1S
       && PCSCode <= PCS_WGS72_UTM_zone_60S )
    {
  Datum = GCS_WGS_72;
  Proj = MapSys_UTM_South;
  nZone = PCSCode - PCS_WGS72_UTM_zone_1S + 1;
    }

    else if( PCSCode >= PCS_WGS72BE_UTM_zone_1N
       && PCSCode <= PCS_WGS72BE_UTM_zone_60N )
    {
  Datum = GCS_WGS_72BE;
  Proj = MapSys_UTM_North;
  nZone = PCSCode - PCS_WGS72BE_UTM_zone_1N + 1;
    }
    else if( PCSCode >= PCS_WGS72BE_UTM_zone_1S
       && PCSCode <= PCS_WGS72BE_UTM_zone_60S )
    {
  Datum = GCS_WGS_72BE;
  Proj = MapSys_UTM_South;
  nZone = PCSCode - PCS_WGS72BE_UTM_zone_1S + 1;
    }

    else if( PCSCode >= PCS_WGS84_UTM_zone_1N
       && PCSCode <= PCS_WGS84_UTM_zone_60N )
    {
  Datum = GCS_WGS_84;
  Proj = MapSys_UTM_North;
  nZone = PCSCode - PCS_WGS84_UTM_zone_1N + 1;
    }
    else if( PCSCode >= PCS_WGS84_UTM_zone_1S
       && PCSCode <= PCS_WGS84_UTM_zone_60S )
    {
  Datum = GCS_WGS_84;
  Proj = MapSys_UTM_South;
  nZone = PCSCode - PCS_WGS84_UTM_zone_1S + 1;
    }
    else if( PCSCode >= PCS_SAD69_UTM_zone_18N
       && PCSCode <= PCS_SAD69_UTM_zone_22N )
    {
  Datum = KvUserDefined;
  Proj = MapSys_UTM_North;
  nZone = PCSCode - PCS_SAD69_UTM_zone_18N + 18;
    }
    else if( PCSCode >= PCS_SAD69_UTM_zone_17S
       && PCSCode <= PCS_SAD69_UTM_zone_25S )
    {
  Datum = KvUserDefined;
  Proj = MapSys_UTM_South;
  nZone = PCSCode - PCS_SAD69_UTM_zone_17S + 17;
    }

/* -------------------------------------------------------------------- */
/*      State Plane zones, first we translate any PCS_ codes to   */
/*  a Proj_ code that we can get a handle on.     */
/* -------------------------------------------------------------------- */
    for( int i = 0; StatePlaneTable[i] != KvUserDefined; i += 2 )
    {
  if( StatePlaneTable[i] == PCSCode )
      PCSCode = StatePlaneTable[i+1];
    }

    if( PCSCode <= 15900 && PCSCode >= 10000 )
    {
  if( (PCSCode % 100) >= 30 )
        {
            Proj = MapSys_State_Plane_83;
      Datum = GCS_NAD83;
        }
  else
        {
            Proj = MapSys_State_Plane_27;
      Datum = GCS_NAD27;
        }

  nZone = PCSCode - 10000;
  if( Datum == GCS_NAD83 )
      nZone -= 30;
    }

    if( pDatum != NULL )
        *pDatum = Datum;

    if( pZone != NULL )
        *pZone = nZone;

    return Proj;
}

/************************************************************************/
/*                          GTIFProjToMapSys()                          */
/************************************************************************/

/**
 * Translate a Proj_ code into a UTM or State Plane map system, and a zone
 * if possible.
 *
 * @param ProjCode The projection code (Proj_*) as would be stored in the
 * ProjectionGeoKey of a GeoTIFF file.
 * @param pZone Pointer to an integer into which the zone will be placed
 * if the function is successful.
 *
 * @return Returns either MapSys_UTM_North, MapSys_UTM_South,
 * MapSys_State_Plane_27, MapSys_State_Plane_83 or KvUserDefined.
 * KvUserDefined indicates that the
 * function failed to recognise the projection as UTM or State Plane.
 *
 * The zone value is only set if the return code is other than KvUserDefined.
 * For utm map system the returned zone will be between 1 and 60.  For
 * State Plane, the USGS state plane zone number is returned.  For instance,
 * Alabama East is zone 101.
 *
 * This function is useful to recognise UTM and State Plane coordinate
 * systems, and to extract zone numbers so the projections can be
 * represented as UTM rather than as the underlying projection method such
 * Transverse Mercator for instance.
 */

int GTIFProjToMapSys( int ProjCode, int * pZone )

{
    int   nZone = KvUserDefined;
    int   MapSys = KvUserDefined;

/* -------------------------------------------------------------------- */
/*      Handle UTM.                                                     */
/* -------------------------------------------------------------------- */
    if( ProjCode >= Proj_UTM_zone_1N && ProjCode <= Proj_UTM_zone_60N )
    {
  MapSys = MapSys_UTM_North;
  nZone = ProjCode - Proj_UTM_zone_1N + 1;
    }
    else if( ProjCode >= Proj_UTM_zone_1S && ProjCode <= Proj_UTM_zone_60S )
    {
  MapSys = MapSys_UTM_South;
  nZone = ProjCode - Proj_UTM_zone_1S + 1;
    }

/* -------------------------------------------------------------------- */
/*      Handle State Plane.  I think there are some anomalies in        */
/*      here, so this is a bit risky.                                   */
/* -------------------------------------------------------------------- */
    else if( ProjCode >= 10101 && ProjCode <= 15299 )
    {
        if( ProjCode % 100 >= 30 )
        {
            MapSys = MapSys_State_Plane_83;
            nZone = ProjCode - 10000 - 30;
        }
        else
        {
            MapSys = MapSys_State_Plane_27;
            nZone = ProjCode - 10000;
        }
    }

    if( pZone != NULL )
        *pZone = nZone;

    return MapSys;
}

Coverage Report

Created: 2025-06-13 06:18