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geotiff_proj4.c
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geotiff_proj4.c
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/******************************************************************************
* $Id: geotiff_proj4.c 1979 2011-02-24 22:17:39Z warmerdam $
*
* Project: libgeotiff
* Purpose: Code to convert a normalized GeoTIFF definition into a PROJ.4
* (OGDI) compatible projection string.
* Author: Frank Warmerdam, [email protected]
*
******************************************************************************
* Copyright (c) 1999, Frank Warmerdam
*
* 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_serv.h"
#include "geotiff.h"
#include "geo_normalize.h"
#include "geovalues.h"
/************************************************************************/
/* OSRProj4Tokenize() */
/* */
/* Custom tokenizing function for PROJ.4 strings. The main */
/* reason we can't just use CSLTokenizeString is to handle */
/* strings with a + sign in the exponents of parameter values. */
/************************************************************************/
static char **OSRProj4Tokenize( const char *pszFull )
{
char *pszStart = NULL;
char *pszFullWrk;
char **papszTokens;
int i;
int nTokens = 0;
static const int nMaxTokens = 200;
if( pszFull == NULL )
return NULL;
papszTokens = (char **) calloc(sizeof(char*),nMaxTokens);
pszFullWrk = strdup( pszFull );
for( i=0; pszFullWrk[i] != '\0' && nTokens != nMaxTokens-1; i++ )
{
switch( pszFullWrk[i] )
{
case '+':
if( i == 0 || pszFullWrk[i-1] == '\0' )
{
if( pszStart != NULL )
{
if( strstr(pszStart,"=") != NULL )
{
papszTokens[nTokens++] = strdup(pszStart);
}
else
{
char szAsBoolean[100];
strncpy( szAsBoolean,pszStart, sizeof(szAsBoolean)-1-4);
szAsBoolean[sizeof(szAsBoolean)-1-4] = '\0';
strcat( szAsBoolean,"=yes" );
papszTokens[nTokens++] = strdup(szAsBoolean);
}
}
pszStart = pszFullWrk + i + 1;
}
break;
case ' ':
case '\t':
case '\n':
pszFullWrk[i] = '\0';
break;
default:
break;
}
}
if( pszStart != NULL && strlen(pszStart) > 0 )
{
if (nTokens != 199)
papszTokens[nTokens++] = strdup( pszStart );
}
free( pszFullWrk );
return papszTokens;
}
/************************************************************************/
/* OSR_GSV() */
/************************************************************************/
static const char *OSR_GSV( char **papszNV, const char * pszField )
{
size_t field_len = strlen(pszField);
int i;
if( !papszNV )
return NULL;
for( i = 0; papszNV[i] != NULL; i++ )
{
if( EQUALN(papszNV[i],pszField,field_len) )
{
if( papszNV[i][field_len] == '=' )
return papszNV[i] + field_len + 1;
if( strlen(papszNV[i]) == field_len )
return "";
}
}
return NULL;
}
/************************************************************************/
/* OSR_GDV() */
/* */
/* Fetch a particular parameter out of the parameter list, or */
/* the indicated default if it isn't available. This is a */
/* helper function for importFromProj4(). */
/************************************************************************/
static double OSR_GDV( char **papszNV, const char * pszField,
double dfDefaultValue )
{
const char *pszValue = OSR_GSV( papszNV, pszField );
/* special hack to use k_0 if available. */
if( pszValue == NULL && EQUAL(pszField,"k") )
return OSR_GDV( papszNV, "k_0", dfDefaultValue );
if( pszValue == NULL )
return dfDefaultValue;
else
return GTIFAtof(pszValue);
}
/************************************************************************/
/* OSRFreeStringList() */
/************************************************************************/
static void OSRFreeStringList( char ** list )
{
int i;
for( i = 0; list != NULL && list[i] != NULL; i++ )
free( list[i] );
free(list);
}
/************************************************************************/
/* GTIFSetFromProj4() */
/************************************************************************/
int GTIFSetFromProj4( GTIF *gtif, const char *proj4 )
{
char **papszNV = OSRProj4Tokenize( proj4 );
short nSpheroid = KvUserDefined;
double dfSemiMajor=0.0, dfSemiMinor=0.0, dfInvFlattening=0.0;
int nDatum = KvUserDefined;
int nGCS = KvUserDefined;
const char *value;
/* -------------------------------------------------------------------- */
/* Get the ellipsoid definition. */
/* -------------------------------------------------------------------- */
value = OSR_GSV( papszNV, "ellps" );
if( value == NULL )
{
/* nothing */;
}
else if( EQUAL(value,"WGS84") )
nSpheroid = Ellipse_WGS_84;
else if( EQUAL(value,"clrk66") )
nSpheroid = Ellipse_Clarke_1866;
else if( EQUAL(value,"clrk80") )
nSpheroid = Ellipse_Clarke_1880;
else if( EQUAL(value,"GRS80") )
nSpheroid = Ellipse_GRS_1980;
if( nSpheroid == KvUserDefined )
{
dfSemiMajor = OSR_GDV(papszNV,"a",0.0);
dfSemiMinor = OSR_GDV(papszNV,"b",0.0);
dfInvFlattening = OSR_GDV(papszNV,"rf",0.0);
if( dfSemiMinor != 0.0 && dfInvFlattening == 0.0 )
dfInvFlattening = -1.0 / (dfSemiMinor/dfSemiMajor - 1.0);
}
/* -------------------------------------------------------------------- */
/* Get the GCS/Datum code. */
/* -------------------------------------------------------------------- */
value = OSR_GSV( papszNV, "datum" );
if( value == NULL )
{
}
else if( EQUAL(value,"WGS84") )
{
nGCS = GCS_WGS_84;
nDatum = Datum_WGS84;
}
else if( EQUAL(value,"NAD83") )
{
nGCS = GCS_NAD83;
nDatum = Datum_North_American_Datum_1983;
}
else if( EQUAL(value,"NAD27") )
{
nGCS = GCS_NAD27;
nDatum = Datum_North_American_Datum_1927;
}
/* -------------------------------------------------------------------- */
/* Operate on the basis of the projection name. */
/* -------------------------------------------------------------------- */
value = OSR_GSV(papszNV,"proj");
if( value == NULL )
{
OSRFreeStringList( papszNV );
return FALSE;
}
else if( EQUAL(value,"longlat") || EQUAL(value,"latlong") )
{
}
else if( EQUAL(value,"tmerc") )
{
GTIFKeySet(gtif, GTModelTypeGeoKey, TYPE_SHORT, 1,
ModelTypeProjected);
GTIFKeySet(gtif, ProjectedCSTypeGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjectionGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjCoordTransGeoKey, TYPE_SHORT, 1,
CT_TransverseMercator );
GTIFKeySet(gtif, ProjNatOriginLatGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lat_0", 0.0 ) );
GTIFKeySet(gtif, ProjNatOriginLongGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lon_0", 0.0 ) );
GTIFKeySet(gtif, ProjScaleAtNatOriginGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "k", 1.0 ) );
GTIFKeySet(gtif, ProjFalseEastingGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "x_0", 0.0 ) );
GTIFKeySet(gtif, ProjFalseNorthingGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"utm") )
{
int nZone = (int) OSR_GDV(papszNV,"zone",0);
const char *south = OSR_GSV(papszNV,"south");
GTIFKeySet(gtif, GTModelTypeGeoKey, TYPE_SHORT, 1,
ModelTypeProjected);
GTIFKeySet(gtif, ProjectedCSTypeGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjectionGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjCoordTransGeoKey, TYPE_SHORT, 1,
CT_TransverseMercator );
GTIFKeySet(gtif, ProjNatOriginLatGeoKey, TYPE_DOUBLE, 1,
0.0 );
GTIFKeySet(gtif, ProjNatOriginLongGeoKey, TYPE_DOUBLE, 1,
nZone * 6 - 183.0 );
GTIFKeySet(gtif, ProjScaleAtNatOriginGeoKey, TYPE_DOUBLE, 1,
0.9996 );
GTIFKeySet(gtif, ProjFalseEastingGeoKey, TYPE_DOUBLE, 1,
500000.0 );
if( south != NULL )
GTIFKeySet(gtif, ProjFalseNorthingGeoKey, TYPE_DOUBLE, 1,
10000000.0 );
else
GTIFKeySet(gtif, ProjFalseNorthingGeoKey, TYPE_DOUBLE, 1,
0.0 );
}
else if( EQUAL(value,"lcc")
&& OSR_GDV(papszNV, "lat_0", 0.0 )
== OSR_GDV(papszNV, "lat_1", 0.0 ) )
{
GTIFKeySet(gtif, GTModelTypeGeoKey, TYPE_SHORT, 1,
ModelTypeProjected);
GTIFKeySet(gtif, ProjectedCSTypeGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjectionGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjCoordTransGeoKey, TYPE_SHORT, 1,
CT_LambertConfConic_1SP );
GTIFKeySet(gtif, ProjNatOriginLatGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lat_0", 0.0 ) );
GTIFKeySet(gtif, ProjNatOriginLongGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lon_0", 0.0 ) );
GTIFKeySet(gtif, ProjScaleAtNatOriginGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "k", 1.0 ) );
GTIFKeySet(gtif, ProjFalseEastingGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "x_0", 0.0 ) );
GTIFKeySet(gtif, ProjFalseNorthingGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"lcc") )
{
GTIFKeySet(gtif, GTModelTypeGeoKey, TYPE_SHORT, 1,
ModelTypeProjected);
GTIFKeySet(gtif, ProjectedCSTypeGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjectionGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet(gtif, ProjCoordTransGeoKey, TYPE_SHORT, 1,
CT_LambertConfConic_2SP );
GTIFKeySet(gtif, ProjFalseOriginLatGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lat_0", 0.0 ) );
GTIFKeySet(gtif, ProjFalseOriginLongGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lon_0", 0.0 ) );
GTIFKeySet(gtif, ProjStdParallel1GeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lat_1", 0.0 ) );
GTIFKeySet(gtif, ProjStdParallel2GeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "lat_2", 0.0 ) );
GTIFKeySet(gtif, ProjFalseOriginEastingGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "x_0", 0.0 ) );
GTIFKeySet(gtif, ProjFalseOriginNorthingGeoKey, TYPE_DOUBLE, 1,
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
#ifdef notdef
else if( EQUAL(value,"bonne") )
{
SetBonne( OSR_GDV( papszNV, "lat_1", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"cass") )
{
SetCS( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"nzmg") )
{
SetNZMG( OSR_GDV( papszNV, "lat_0", -41.0 ),
OSR_GDV( papszNV, "lon_0", 173.0 ),
OSR_GDV( papszNV, "x_0", 2510000.0 ),
OSR_GDV( papszNV, "y_0", 6023150.0 ) );
}
else if( EQUAL(value,"cea") )
{
SetCEA( OSR_GDV( papszNV, "lat_ts", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"merc") /* 2SP form */
&& OSR_GDV(papszNV, "lat_ts", 1000.0) < 999.0 )
{
SetMercator2SP( OSR_GDV( papszNV, "lat_ts", 0.0 ),
0.0,
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"merc") ) /* 1SP form */
{
SetMercator( 0.0,
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"stere")
&& ABS(OSR_GDV( papszNV, "lat_0", 0.0 ) - 90) < 0.001 )
{
SetPS( OSR_GDV( papszNV, "lat_ts", 90.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"stere")
&& ABS(OSR_GDV( papszNV, "lat_0", 0.0 ) + 90) < 0.001 )
{
SetPS( OSR_GDV( papszNV, "lat_ts", -90.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUALN(value,"stere",5) /* mostly sterea */
&& CSLFetchNameValue(papszNV,"k") != NULL )
{
SetOS( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"stere") )
{
SetStereographic( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
1.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"eqc") )
{
if( OSR_GDV( papszNV, "lat_0", 0.0 ) != OSR_GDV( papszNV, "lat_ts", 0.0 ) )
SetEquirectangular2( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 )+dfFromGreenwich,
OSR_GDV( papszNV, "lat_ts", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
else
SetEquirectangular( OSR_GDV( papszNV, "lat_ts", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 )+dfFromGreenwich,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"glabsgm") )
{
SetGaussLabordeReunion( OSR_GDV( papszNV, "lat_0", -21.116666667 ),
OSR_GDV( papszNV, "lon_0", 55.53333333309)+dfFromGreenwich,
OSR_GDV( papszNV, "k_0", 1.0 ),
OSR_GDV( papszNV, "x_0", 160000.000 ),
OSR_GDV( papszNV, "y_0", 50000.000 ) );
}
else if( EQUAL(value,"gnom") )
{
SetGnomonic( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"ortho") )
{
SetOrthographic( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"laea") )
{
SetLAEA( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"aeqd") )
{
SetAE( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"eqdc") )
{
SetEC( OSR_GDV( papszNV, "lat_1", 0.0 ),
OSR_GDV( papszNV, "lat_2", 0.0 ),
OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"mill") )
{
SetMC( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"moll") )
{
SetMollweide( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"eck4") )
{
SetEckertIV( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"eck6") )
{
SetEckertVI( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"poly") )
{
SetPolyconic( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"aea") )
{
SetACEA( OSR_GDV( papszNV, "lat_1", 0.0 ),
OSR_GDV( papszNV, "lat_2", 0.0 ),
OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"robin") )
{
SetRobinson( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"vandg") )
{
SetVDG( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"sinu") )
{
SetSinusoidal( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"gall") )
{
SetGS( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"goode") )
{
SetGH( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"geos") )
{
SetGEOS( OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "h", 35785831.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"lcc") )
{
if( OSR_GDV(papszNV, "lat_0", 0.0 )
== OSR_GDV(papszNV, "lat_1", 0.0 ) )
{
/* 1SP form */
SetLCC1SP( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "k_0", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else
{
/* 2SP form */
SetLCC( OSR_GDV( papszNV, "lat_1", 0.0 ),
OSR_GDV( papszNV, "lat_2", 0.0 ),
OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
}
else if( EQUAL(value,"omerc") )
{
SetHOM( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lonc", 0.0 ),
OSR_GDV( papszNV, "alpha", 0.0 ),
0.0, /* ??? */
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"somerc") )
{
SetHOM( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
90.0, 90.0,
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"krovak") )
{
SetKrovak( OSR_GDV( papszNV, "lat_0", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "alpha", 0.0 ),
0.0, /* pseudo_standard_parallel_1 */
OSR_GDV( papszNV, "k", 1.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "iwm_p") )
{
SetIWMPolyconic( OSR_GDV( papszNV, "lat_1", 0.0 ),
OSR_GDV( papszNV, "lat_2", 0.0 ),
OSR_GDV( papszNV, "lon_0", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag1") )
{
SetWagner( 1, 0.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag2") )
{
SetWagner( 2, 0.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag3") )
{
SetWagner( 3,
OSR_GDV( papszNV, "lat_ts", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag1") )
{
SetWagner( 4, 0.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag1") )
{
SetWagner( 5, 0.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag1") )
{
SetWagner( 6, 0.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value, "wag1") )
{
SetWagner( 7, 0.0,
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
else if( EQUAL(value,"tpeqd") )
{
SetTPED( OSR_GDV( papszNV, "lat_1", 0.0 ),
OSR_GDV( papszNV, "lon_1", 0.0 ),
OSR_GDV( papszNV, "lat_2", 0.0 ),
OSR_GDV( papszNV, "lon_2", 0.0 ),
OSR_GDV( papszNV, "x_0", 0.0 ),
OSR_GDV( papszNV, "y_0", 0.0 ) );
}
#endif
else
{
/* unsupported coordinate system */
OSRFreeStringList( papszNV );
return FALSE;
}
/* -------------------------------------------------------------------- */
/* Write the GCS if we have it, otherwise write the datum. */
/* -------------------------------------------------------------------- */
if( nGCS != KvUserDefined )
{
GTIFKeySet( gtif, GeographicTypeGeoKey, TYPE_SHORT,
1, nGCS );
}
else
{
GTIFKeySet( gtif, GeographicTypeGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet( gtif, GeogGeodeticDatumGeoKey, TYPE_SHORT,
1, nDatum );
}
/* -------------------------------------------------------------------- */
/* Write the ellipsoid if we don't know the GCS. */
/* -------------------------------------------------------------------- */
if( nGCS == KvUserDefined )
{
if( nSpheroid != KvUserDefined )
GTIFKeySet( gtif, GeogEllipsoidGeoKey, TYPE_SHORT, 1,
nSpheroid );
else
{
GTIFKeySet( gtif, GeogEllipsoidGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet( gtif, GeogSemiMajorAxisGeoKey, TYPE_DOUBLE, 1,
dfSemiMajor );
if( dfInvFlattening == 0.0 )
GTIFKeySet( gtif, GeogSemiMinorAxisGeoKey, TYPE_DOUBLE, 1,
dfSemiMajor );
else
GTIFKeySet( gtif, GeogInvFlatteningGeoKey, TYPE_DOUBLE, 1,
dfInvFlattening );
}
}
/* -------------------------------------------------------------------- */
/* Linear units translation */
/* -------------------------------------------------------------------- */
value = OSR_GSV( papszNV, "units" );
if( value == NULL )
{
value = OSR_GSV( papszNV, "to_meter" );
if( value )
{
GTIFKeySet( gtif, ProjLinearUnitsGeoKey, TYPE_SHORT, 1,
KvUserDefined );
GTIFKeySet( gtif, ProjLinearUnitSizeGeoKey, TYPE_DOUBLE, 1,
GTIFAtof(value) );
}
}
else if( EQUAL(value,"meter") || EQUAL(value,"m") )
{
GTIFKeySet( gtif, ProjLinearUnitsGeoKey, TYPE_SHORT, 1,
Linear_Meter );
}
else if( EQUAL(value,"us-ft") )
{
GTIFKeySet( gtif, ProjLinearUnitsGeoKey, TYPE_SHORT, 1,
Linear_Foot_US_Survey );
}
else if( EQUAL(value,"ft") )
{
GTIFKeySet( gtif, ProjLinearUnitsGeoKey, TYPE_SHORT, 1,
Linear_Foot );
}
OSRFreeStringList( papszNV );
return TRUE;
}
/************************************************************************/
/* GTIFGetProj4Defn() */
/************************************************************************/
char * GTIFGetProj4Defn( GTIFDefn * psDefn )
{
char szProjection[512];
char szUnits[64];
double dfFalseEasting, dfFalseNorthing;
if( psDefn == NULL || !psDefn->DefnSet )
return strdup("");
szProjection[0] = '\0';
/* ==================================================================== */
/* Translate the units of measure. */
/* */
/* Note that even with a +units, or +to_meter in effect, it is */
/* still assumed that all the projection parameters are in */
/* meters. */
/* ==================================================================== */
if( psDefn->UOMLength == Linear_Meter )
{
strcpy( szUnits, "+units=m " );
}
else if( psDefn->UOMLength == Linear_Foot )
{
strcpy( szUnits, "+units=ft " );
}
else if( psDefn->UOMLength == Linear_Foot_US_Survey )
{
strcpy( szUnits, "+units=us-ft " );
}
else if( psDefn->UOMLength == Linear_Foot_Indian )
{
strcpy( szUnits, "+units=ind-ft " );
}
else if( psDefn->UOMLength == Linear_Link )
{
strcpy( szUnits, "+units=link " );
}
else if( psDefn->UOMLength == Linear_Yard_Indian)
{
strcpy( szUnits, "+units=ind-yd " );
}
else if( psDefn->UOMLength == Linear_Fathom )
{
strcpy( szUnits, "+units=fath " );
}
else if( psDefn->UOMLength == Linear_Mile_International_Nautical )
{
strcpy( szUnits, "+units=kmi " );
}
else
{
sprintf( szUnits, "+to_meter=%.10f", psDefn->UOMLengthInMeters );
}
/* -------------------------------------------------------------------- */
/* false easting and northing are in meters and that is what */
/* PROJ.4 wants regardless of the linear units. */
/* -------------------------------------------------------------------- */
dfFalseEasting = psDefn->ProjParm[5];
dfFalseNorthing = psDefn->ProjParm[6];
/* ==================================================================== */
/* Handle general projection methods. */
/* ==================================================================== */
/* -------------------------------------------------------------------- */
/* Geographic. */
/* -------------------------------------------------------------------- */
if(psDefn->Model==ModelTypeGeographic)
{
sprintf(szProjection+strlen(szProjection),"+proj=latlong ");
}
/* -------------------------------------------------------------------- */
/* UTM - special case override on transverse mercator so things */
/* will be more meaningful to the user. */
/* -------------------------------------------------------------------- */
else if( psDefn->MapSys == MapSys_UTM_North )
{
sprintf( szProjection+strlen(szProjection),
"+proj=utm +zone=%d ",
psDefn->Zone );
}
/* -------------------------------------------------------------------- */
/* Transverse Mercator */
/* -------------------------------------------------------------------- */
else if( psDefn->CTProjection == CT_TransverseMercator )
{
sprintf( szProjection+strlen(szProjection),
"+proj=tmerc +lat_0=%.9f +lon_0=%.9f +k=%f +x_0=%.3f +y_0=%.3f ",
psDefn->ProjParm[0],
psDefn->ProjParm[1],
psDefn->ProjParm[4],
dfFalseEasting,
dfFalseNorthing );
}
/* -------------------------------------------------------------------- */
/* Mercator */
/* -------------------------------------------------------------------- */
else if( psDefn->CTProjection == CT_Mercator )
{
sprintf( szProjection+strlen(szProjection),
"+proj=merc +lat_ts=%.9f +lon_0=%.9f +k=%f +x_0=%.3f +y_0=%.3f ",
psDefn->ProjParm[0],
psDefn->ProjParm[1],
psDefn->ProjParm[4],
dfFalseEasting,
dfFalseNorthing );
}
/* -------------------------------------------------------------------- */
/* Cassini/Soldner */
/* -------------------------------------------------------------------- */
else if( psDefn->CTProjection == CT_CassiniSoldner )
{
sprintf( szProjection+strlen(szProjection),
"+proj=cass +lat_0=%.9f +lon_0=%.9f +x_0=%.3f +y_0=%.3f ",
psDefn->ProjParm[0],
psDefn->ProjParm[1],
dfFalseEasting,
dfFalseNorthing );
}
/* -------------------------------------------------------------------- */
/* Oblique Stereographic - Should this really map onto */
/* Stereographic? */
/* -------------------------------------------------------------------- */
else if( psDefn->CTProjection == CT_ObliqueStereographic )
{
sprintf( szProjection+strlen(szProjection),
"+proj=stere +lat_0=%.9f +lon_0=%.9f +k=%f +x_0=%.3f +y_0=%.3f ",
psDefn->ProjParm[0],
psDefn->ProjParm[1],
psDefn->ProjParm[4],
dfFalseEasting,
dfFalseNorthing );
}
/* -------------------------------------------------------------------- */
/* Stereographic */
/* -------------------------------------------------------------------- */
else if( psDefn->CTProjection == CT_Stereographic )
{
sprintf( szProjection+strlen(szProjection),
"+proj=stere +lat_0=%.9f +lon_0=%.9f +x_0=%.3f +y_0=%.3f ",
psDefn->ProjParm[0],
psDefn->ProjParm[1],
dfFalseEasting,
dfFalseNorthing );
}
/* -------------------------------------------------------------------- */
/* Polar Stereographic */