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mapproject.c
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mapproject.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: projectionObj / PROJ.4 interface.
* Author: Steve Lime and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2005 Regents of the University of Minnesota.
*
* 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 of this Software or works derived from this 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 "mapserver.h"
#include "mapproject.h"
#include "mapthread.h"
#include <assert.h>
#include <float.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "mapaxisorder.h"
#include "ogr_srs_api.h"
static char *ms_proj_lib = NULL;
#if PROJ_VERSION_MAJOR >= 6
static unsigned ms_proj_lib_change_counter = 0;
#endif
typedef struct LinkedListOfProjContext LinkedListOfProjContext;
struct LinkedListOfProjContext
{
LinkedListOfProjContext* next;
projectionContext* context;
};
static LinkedListOfProjContext* headOfLinkedListOfProjContext = NULL;
static int msTestNeedWrap( pointObj pt1, pointObj pt2, pointObj pt2_geo,
reprojectionObj* reprojector );
static projectionContext* msProjectionContextCreate(void);
static void msProjectionContextUnref(projectionContext* ctx);
#if PROJ_VERSION_MAJOR >= 6
#include "proj_experimental.h"
struct reprojectionObj
{
projectionObj* in;
projectionObj* out;
PJ* pj;
int should_do_line_cutting;
shapeObj splitShape;
int bFreePJ;
};
/* Helps considerably for use cases like msautotest/wxs/wms_inspire.map */
/* which involve a number of layers with same SRS, and a number of exposed */
/* output SRS */
#define PJ_CACHE_ENTRY_SIZE 32
typedef struct
{
char* inStr;
char* outStr;
PJ* pj;
} pjCacheEntry;
struct projectionContext
{
PJ_CONTEXT* proj_ctx;
unsigned ms_proj_lib_change_counter;
int ref_count;
pjCacheEntry pj_cache[PJ_CACHE_ENTRY_SIZE];
int pj_cache_size;
};
/************************************************************************/
/* msProjectHasLonWrapOrOver() */
/************************************************************************/
static int msProjectHasLonWrapOrOver(projectionObj *in) {
int i;
for( i = 0; i < in->numargs; i++ )
{
if( strncmp(in->args[i], "lon_wrap=", strlen("lon_wrap=")) == 0 ||
strcmp(in->args[i], "+over") == 0 ||
strcmp(in->args[i], "over") == 0 )
{
return MS_TRUE;
}
}
return MS_FALSE;
}
/************************************************************************/
/* createNormalizedPJ() */
/************************************************************************/
/* Return to be freed with proj_destroy() if *pbFreePJ = TRUE */
static PJ* createNormalizedPJ(projectionObj *in, projectionObj *out, int* pbFreePJ)
{
if( in->proj == out->proj )
{
/* Special case to avoid out_str below to cause in_str to become invalid */
*pbFreePJ = TRUE;
#if PROJ_VERSION_MAJOR == 6 && PROJ_VERSION_MINOR == 0
/* 6.0 didn't support proj=noop */
return proj_create(in->proj_ctx->proj_ctx, "+proj=affine");
#else
return proj_create(in->proj_ctx->proj_ctx, "+proj=noop");
#endif
}
const char* const wkt_options[] = { "MULTILINE=NO", NULL };
const char* in_str = msProjectHasLonWrapOrOver(in) ?
proj_as_proj_string(in->proj_ctx->proj_ctx, in->proj, PJ_PROJ_4, NULL) :
proj_as_wkt(in->proj_ctx->proj_ctx, in->proj, PJ_WKT2_2018, wkt_options);
const char* out_str = msProjectHasLonWrapOrOver(out) ?
proj_as_proj_string(out->proj_ctx->proj_ctx, out->proj, PJ_PROJ_4, NULL) :
proj_as_wkt(out->proj_ctx->proj_ctx, out->proj, PJ_WKT2_2018, wkt_options);
PJ* pj_raw;
PJ* pj_normalized;
if( !in_str || !out_str )
return NULL;
if( in->proj_ctx->proj_ctx == out->proj_ctx->proj_ctx )
{
int i;
pjCacheEntry* pj_cache = in->proj_ctx->pj_cache;
for( i = 0; i < in->proj_ctx->pj_cache_size; i++ )
{
if (strcmp(pj_cache[i].inStr, in_str) == 0 &&
strcmp(pj_cache[i].outStr, out_str) == 0 )
{
PJ* ret = pj_cache[i].pj;
if( i != 0 )
{
/* Move entry to top */
pjCacheEntry tmp;
memcpy(&tmp, &pj_cache[i], sizeof(pjCacheEntry));
memmove(&pj_cache[1], &pj_cache[0], i * sizeof(pjCacheEntry));
memcpy(&pj_cache[0], &tmp, sizeof(pjCacheEntry));
}
#ifdef notdef
fprintf(stderr, "cache hit!\n");
#endif
*pbFreePJ = FALSE;
return ret;
}
}
}
#ifdef notdef
fprintf(stderr, "%s -> %s\n", in_str, out_str);
fprintf(stderr, "%p -> %p\n", in->proj_ctx->proj_ctx, out->proj_ctx->proj_ctx);
fprintf(stderr, "cache miss!\n");
#endif
#if PROJ_VERSION_MAJOR == 6 && PROJ_VERSION_MINOR < 2
if( strstr(in_str, "+proj=") && strstr(in_str, "+over") &&
strstr(out_str, "+proj=") && strstr(out_str, "+over") &&
strlen(in_str) < 400 && strlen(out_str) < 400 )
{
// Fixed per PROJ commit
// https://github.com/OSGeo/PROJ/commit/78302efb70eb4b49610cda6a60bf9ce39b82264f
// and
// https://github.com/OSGeo/PROJ/commit/ae70b26b9cbae85a38d5b26533ba06da0ea13940
// Fix for wcs_get_capabilities_tileindexmixedsrs_26711.xml and wcs_20_getcov_bands_name_new_reproject.dat
char szPipeline[1024];
strcpy(szPipeline, "+proj=pipeline");
if( msProjIsGeographicCRS(in) )
{
strcat(szPipeline, " +step +proj=unitconvert +xy_in=deg +xy_out=rad");
}
strcat(szPipeline, " +step +inv ");
strcat(szPipeline, in_str);
strcat(szPipeline, " +step ");
strcat(szPipeline, out_str);
if( msProjIsGeographicCRS(out) )
{
strcat(szPipeline, " +step +proj=unitconvert +xy_in=rad +xy_out=deg");
}
/* We do not want datum=NAD83 to imply a transformation with towgs84=0,0,0 */
{
char* ptr = szPipeline;
while(1)
{
ptr = strstr(ptr, " +datum=NAD83");
if( !ptr )
break;
memcpy(ptr, " +ellps=GRS80", 13);
}
}
/* Remove +nadgrids=@null as it doesn't work if going outside of [-180,180] */
/* Fixed per https://github.com/OSGeo/PROJ/commit/10a30bb539be1afb25952b19af8bbe72e1b13b56 */
{
char* ptr = strstr(szPipeline, " +nadgrids=@null");
if( ptr )
memcpy(ptr, " ", 16);
}
pj_normalized = proj_create(in->proj_ctx->proj_ctx, szPipeline);
}
else
#endif
{
pj_raw = proj_create_crs_to_crs(in->proj_ctx->proj_ctx, in_str, out_str, NULL);
if( !pj_raw )
return NULL;
pj_normalized = proj_normalize_for_visualization(in->proj_ctx->proj_ctx, pj_raw);
proj_destroy(pj_raw);
}
if( !pj_normalized )
return NULL;
if( in->proj_ctx->proj_ctx == out->proj_ctx->proj_ctx )
{
/* Insert entry into cache */
int i;
pjCacheEntry* pj_cache = in->proj_ctx->pj_cache;
if( in->proj_ctx->pj_cache_size < PJ_CACHE_ENTRY_SIZE )
{
i = in->proj_ctx->pj_cache_size;
assert ( pj_cache[i].inStr == NULL );
in->proj_ctx->pj_cache_size ++;
}
else
{
i = 0;
/* Evict oldest entry */
msFree(pj_cache[PJ_CACHE_ENTRY_SIZE - 1].inStr);
msFree(pj_cache[PJ_CACHE_ENTRY_SIZE - 1].outStr);
proj_destroy(pj_cache[PJ_CACHE_ENTRY_SIZE - 1].pj);
memmove(&pj_cache[1], &pj_cache[0],
(PJ_CACHE_ENTRY_SIZE - 1) * sizeof(pjCacheEntry));
}
pj_cache[i].inStr = msStrdup(in_str);
pj_cache[i].outStr = msStrdup(out_str);
pj_cache[i].pj = pj_normalized;
*pbFreePJ = FALSE;
}
else
{
*pbFreePJ = TRUE;
}
return pj_normalized;
}
/************************************************************************/
/* getBaseGeographicCRS() */
/************************************************************************/
/* Return to be freed with proj_destroy() */
static PJ* getBaseGeographicCRS(projectionObj* in)
{
PJ_CONTEXT* ctxt;
PJ_TYPE type;
assert(in && in->proj);
ctxt = in->proj_ctx->proj_ctx;
type = proj_get_type(in->proj);
if( type == PJ_TYPE_PROJECTED_CRS )
{
return proj_get_source_crs(ctxt, in->proj);
}
if( type == PJ_TYPE_BOUND_CRS )
{
/* If it is a boundCRS of a projectedCRS, extract the geographicCRS
* from the projectedCRS, and rewrap it in a boundCRS */
PJ* source_crs = proj_get_source_crs(ctxt, in->proj);
PJ* geog_source_crs;
PJ* hub_crs;
PJ* transf;
PJ* ret;
if( proj_get_type(source_crs) != PJ_TYPE_PROJECTED_CRS )
{
proj_destroy(source_crs);
return NULL;
}
geog_source_crs = proj_get_source_crs(ctxt, source_crs);
proj_destroy(source_crs);
hub_crs = proj_get_target_crs(ctxt, in->proj);
transf = proj_crs_get_coordoperation(ctxt, in->proj);
ret = proj_crs_create_bound_crs(ctxt, geog_source_crs,
hub_crs, transf);
proj_destroy(geog_source_crs);
proj_destroy(hub_crs);
proj_destroy(transf);
return ret;
}
return NULL;
}
/************************************************************************/
/* msProjErrorLogger() */
/************************************************************************/
static void msProjErrorLogger(void * user_data,
int level, const char * message)
{
(void)user_data;
if( level == PJ_LOG_ERROR )
{
msDebug( "PROJ: Error: %s\n", message );
}
else if( level == PJ_LOG_DEBUG )
{
msDebug( "PROJ: Debug: %s\n", message );
}
}
/************************************************************************/
/* msProjectionContextCreate() */
/************************************************************************/
projectionContext* msProjectionContextCreate(void)
{
projectionContext* ctx = (projectionContext*)msSmallCalloc(1, sizeof(projectionContext));
ctx->proj_ctx = proj_context_create();
if( ctx->proj_ctx == NULL )
{
msFree(ctx);
return NULL;
}
ctx->ref_count = 1;
proj_context_use_proj4_init_rules(ctx->proj_ctx, TRUE);
proj_log_func (ctx->proj_ctx, NULL, msProjErrorLogger);
return ctx;
}
/************************************************************************/
/* msProjectionContextUnref() */
/************************************************************************/
void msProjectionContextUnref(projectionContext* ctx)
{
if( !ctx )
return;
--ctx->ref_count;
if( ctx->ref_count == 0 )
{
int i;
for( i = 0; i < ctx->pj_cache_size; i++ )
{
msFree(ctx->pj_cache[i].inStr);
msFree(ctx->pj_cache[i].outStr);
proj_destroy(ctx->pj_cache[i].pj);
}
proj_context_destroy(ctx->proj_ctx);
msFree(ctx);
}
}
/************************************************************************/
/* msProjectCreateReprojector() */
/************************************************************************/
reprojectionObj* msProjectCreateReprojector(projectionObj* in, projectionObj* out)
{
reprojectionObj* obj = (reprojectionObj*)msSmallCalloc(1, sizeof(reprojectionObj));
obj->in = in;
obj->out = out;
obj->should_do_line_cutting = -1;
/* -------------------------------------------------------------------- */
/* If the source and destination are simple and equal, then do */
/* nothing. */
/* -------------------------------------------------------------------- */
if( in && in->numargs == 1 && out && out->numargs == 1
&& strcmp(in->args[0],out->args[0]) == 0 ) {
/* do nothing, no transformation required */
}
/* -------------------------------------------------------------------- */
/* If we have a fully defined input coordinate system and */
/* output coordinate system, then we will use createNormalizedPJ */
/* -------------------------------------------------------------------- */
else if( in && in->proj && out && out->proj ) {
PJ* pj = createNormalizedPJ(in, out, &(obj->bFreePJ));
if( !pj )
{
msFree(obj);
return NULL;
}
obj->pj = pj;
}
/* nothing to do if the other coordinate system is also lat/long */
else if( (in == NULL || in->proj == NULL) &&
(out == NULL || out->proj == NULL || msProjIsGeographicCRS(out) ))
{
/* do nothing */
}
else if( out == NULL && in != NULL && msProjIsGeographicCRS(in) )
{
/* do nothing */
}
/* -------------------------------------------------------------------- */
/* Otherwise we assume that the NULL projectionObj is supposed to be */
/* lat/long in the same datum as the other projectionObj. This */
/* is essentially a backwards compatibility mode. */
/* -------------------------------------------------------------------- */
else {
PJ* pj = NULL;
if( (in==NULL || in->proj==NULL) && out && out->proj) { /* input coordinates are lat/lon */
PJ* source_crs = getBaseGeographicCRS(out);
projectionObj in_modified;
memset(&in_modified, 0, sizeof(in_modified));
in_modified.proj_ctx = out->proj_ctx;
in_modified.proj = source_crs;
pj = createNormalizedPJ(&in_modified, out, &(obj->bFreePJ));
proj_destroy(source_crs);
} else if( /* (out==NULL || out->proj==NULL) && */ in && in->proj ) {
PJ* target_crs = getBaseGeographicCRS(in);
projectionObj out_modified;
memset(&out_modified, 0, sizeof(out_modified));
out_modified.proj_ctx = in->proj_ctx;
out_modified.proj = target_crs;
pj = createNormalizedPJ(in, &out_modified, &(obj->bFreePJ));
proj_destroy(target_crs);
}
if( !pj )
{
msFree(obj);
return NULL;
}
obj->pj = pj;
}
return obj;
}
/************************************************************************/
/* msProjectDestroyReprojector() */
/************************************************************************/
void msProjectDestroyReprojector(reprojectionObj* reprojector)
{
if( !reprojector )
return;
if( reprojector->bFreePJ )
proj_destroy(reprojector->pj);
msFreeShape(&(reprojector->splitShape));
msFree(reprojector);
}
/************************************************************************/
/* msProjectTransformPoints() */
/************************************************************************/
int msProjectTransformPoints( reprojectionObj* reprojector,
int npoints, double* x, double* y )
{
proj_trans_generic (reprojector->pj, PJ_FWD,
x, sizeof(double), npoints,
y, sizeof(double), npoints,
NULL, 0, 0,
NULL, 0, 0 );
return MS_SUCCESS;
}
#else
/************************************************************************/
/* msProjectionContextCreate() */
/************************************************************************/
projectionContext* msProjectionContextCreate(void)
{
return NULL;
}
/************************************************************************/
/* msProjectionContextUnref() */
/************************************************************************/
void msProjectionContextUnref(projectionContext* ctx)
{
(void)ctx;
}
struct reprojectionObj
{
projectionObj* in;
projectionObj* out;
int should_do_line_cutting;
shapeObj splitShape;
int no_op;
};
/************************************************************************/
/* msProjectCreateReprojector() */
/************************************************************************/
reprojectionObj* msProjectCreateReprojector(projectionObj* in, projectionObj* out)
{
reprojectionObj* obj;
obj = (reprojectionObj*)msSmallCalloc(1, sizeof(reprojectionObj));
obj->in = in;
obj->out = out;
obj->should_do_line_cutting = -1;
/* -------------------------------------------------------------------- */
/* If the source and destination are equal, then do nothing. */
/* -------------------------------------------------------------------- */
if( in && out && in->numargs == out->numargs && in->numargs > 0
&& strcmp(in->args[0],out->args[0]) == 0 )
{
int i;
obj->no_op = MS_TRUE;
for( i = 1; i < in->numargs; i++ )
{
if( strcmp(in->args[i],out->args[i]) != 0 ) {
obj->no_op = MS_FALSE;
break;
}
}
}
/* -------------------------------------------------------------------- */
/* If we have a fully defined input coordinate system and */
/* output coordinate system, then we will use pj_transform */
/* -------------------------------------------------------------------- */
else if( in && in->proj && out && out->proj ) {
/* do nothing for now */
}
/* nothing to do if the other coordinate system is also lat/long */
else if( in == NULL && (out == NULL || msProjIsGeographicCRS(out) ))
{
obj->no_op = MS_TRUE;
}
else if( out == NULL && in != NULL && msProjIsGeographicCRS(in) )
{
obj->no_op = MS_TRUE;
}
return obj;
}
/************************************************************************/
/* msProjectDestroyReprojector() */
/************************************************************************/
void msProjectDestroyReprojector(reprojectionObj* reprojector)
{
if( !reprojector )
return;
msFreeShape(&(reprojector->splitShape));
msFree(reprojector);
}
#endif
/*
** Initialize, load and free a projectionObj structure
*/
int msInitProjection(projectionObj *p)
{
p->gt.need_geotransform = MS_FALSE;
p->numargs = 0;
p->args = NULL;
p->wellknownprojection = wkp_none;
p->proj = NULL;
p->args = (char **)malloc(MS_MAXPROJARGS*sizeof(char *));
MS_CHECK_ALLOC(p->args, MS_MAXPROJARGS*sizeof(char *), -1);
#if PROJ_VERSION_MAJOR >= 6
p->proj_ctx = NULL;
#elif PJ_VERSION >= 480
p->proj_ctx = NULL;
#endif
return(0);
}
void msFreeProjection(projectionObj *p)
{
#if PROJ_VERSION_MAJOR >= 6
proj_destroy(p->proj);
p->proj = NULL;
msProjectionContextUnref(p->proj_ctx);
p->proj_ctx = NULL;
#else
if(p->proj) {
pj_free(p->proj);
p->proj = NULL;
}
#if PJ_VERSION >= 480
if(p->proj_ctx) {
pj_ctx_free(p->proj_ctx);
p->proj_ctx = NULL;
}
#endif
#endif
p->gt.need_geotransform = MS_FALSE;
p->wellknownprojection = wkp_none;
msFreeCharArray(p->args, p->numargs);
p->args = NULL;
p->numargs = 0;
}
void msFreeProjectionExceptContext(projectionObj *p)
{
#if PROJ_VERSION_MAJOR >= 6
projectionContext* ctx = p->proj_ctx;
p->proj_ctx = NULL;
msFreeProjection(p);
p->proj_ctx = ctx;
#else
msFreeProjection(p);
#endif
}
/************************************************************************/
/* msProjectionInheritContextFrom() */
/************************************************************************/
void msProjectionInheritContextFrom(projectionObj *pDst, const projectionObj* pSrc)
{
#if PROJ_VERSION_MAJOR >= 6
if( pDst->proj_ctx == NULL && pSrc->proj_ctx != NULL)
{
pDst->proj_ctx = pSrc->proj_ctx;
pDst->proj_ctx->ref_count ++;
}
#endif
}
/************************************************************************/
/* msProjectionSetContext() */
/************************************************************************/
void msProjectionSetContext(projectionObj *p, projectionContext* ctx)
{
#if PROJ_VERSION_MAJOR >= 6
if( p->proj_ctx == NULL && ctx != NULL)
{
p->proj_ctx = ctx;
p->proj_ctx->ref_count ++;
}
#endif
}
/*
** Handle OGC WMS/WFS AUTO projection in the format:
** "AUTO:proj_id,units_id,lon0,lat0"
*/
static int _msProcessAutoProjection(projectionObj *p)
{
char **args;
int numargs, nProjId, nUnitsId, nZone;
double dLat0, dLon0;
const char *pszUnits = "m";
char szProjBuf[512]="";
/* WMS/WFS AUTO projection: "AUTO:proj_id,units_id,lon0,lat0" */
args = msStringSplit(p->args[0], ',', &numargs);
if (numargs != 4 ||
(strncasecmp(args[0], "AUTO:", 5) != 0 &&
strncasecmp(args[0], "AUTO2:", 6) != 0)) {
msSetError(MS_PROJERR,
"WMS/WFS AUTO/AUTO2 PROJECTION must be in the format "
"'AUTO:proj_id,units_id,lon0,lat0' or 'AUTO2:crs_id,factor,lon0,lat0'(got '%s').\n",
"_msProcessAutoProjection()", p->args[0]);
return -1;
}
if (strncasecmp(args[0], "AUTO:", 5)==0)
nProjId = atoi(args[0]+5);
else
nProjId = atoi(args[0]+6);
nUnitsId = atoi(args[1]);
dLon0 = atof(args[2]);
dLat0 = atof(args[3]);
/*There is no unit parameter for AUTO2. The 2nd parameter is
factor. Set the units to always be meter*/
if (strncasecmp(args[0], "AUTO2:", 6) == 0)
nUnitsId = 9001;
msFreeCharArray(args, numargs);
/* Handle EPSG Units. Only meters for now. */
switch(nUnitsId) {
case 9001: /* Meters */
pszUnits = "m";
break;
default:
msSetError(MS_PROJERR,
"WMS/WFS AUTO PROJECTION: EPSG Units %d not supported.\n",
"_msProcessAutoProjection()", nUnitsId);
return -1;
}
/* Build PROJ4 definition.
* This is based on the definitions found in annex E of the WMS 1.1.1
* spec and online at http://www.digitalearth.org/wmt/auto.html
* The conversion from the original WKT definitions to PROJ4 format was
* done using the MapScript setWKTProjection() function (based on OGR).
*/
switch(nProjId) {
case 42001: /** WGS 84 / Auto UTM **/
nZone = (int) floor( (dLon0 + 180.0) / 6.0 ) + 1;
sprintf( szProjBuf,
"+proj=tmerc+lat_0=0+lon_0=%.16g+k=0.999600+x_0=500000"
"+y_0=%.16g+ellps=WGS84+datum=WGS84+units=%s+type=crs",
-183.0 + nZone * 6.0,
(dLat0 >= 0.0) ? 0.0 : 10000000.0,
pszUnits);
break;
case 42002: /** WGS 84 / Auto Tr. Mercator **/
sprintf( szProjBuf,
"+proj=tmerc+lat_0=0+lon_0=%.16g+k=0.999600+x_0=500000"
"+y_0=%.16g+ellps=WGS84+datum=WGS84+units=%s+type=crs",
dLon0,
(dLat0 >= 0.0) ? 0.0 : 10000000.0,
pszUnits);
break;
case 42003: /** WGS 84 / Auto Orthographic **/
sprintf( szProjBuf,
"+proj=ortho+lon_0=%.16g+lat_0=%.16g+x_0=0+y_0=0"
"+ellps=WGS84+datum=WGS84+units=%s+type=crs",
dLon0, dLat0, pszUnits );
break;
case 42004: /** WGS 84 / Auto Equirectangular **/
/* Note that we have to pass lon_0 as lon_ts for this one to */
/* work. Either a PROJ4 bug or a PROJ4 documentation issue. */
sprintf( szProjBuf,
"+proj=eqc+lon_ts=%.16g+lat_ts=%.16g+x_0=0+y_0=0"
"+ellps=WGS84+datum=WGS84+units=%s+type=crs",
dLon0, dLat0, pszUnits);
break;
case 42005: /** WGS 84 / Auto Mollweide **/
sprintf( szProjBuf,
"+proj=moll+lon_0=%.16g+x_0=0+y_0=0+ellps=WGS84"
"+datum=WGS84+units=%s+type=crs",
dLon0, pszUnits);
break;
default:
msSetError(MS_PROJERR,
"WMS/WFS AUTO PROJECTION %d not supported.\n",
"_msProcessAutoProjection()", nProjId);
return -1;
}
/* msDebug("%s = %s\n", p->args[0], szProjBuf); */
/* OK, pass the definition to pj_init() */
args = msStringSplit(szProjBuf, '+', &numargs);
#if PROJ_VERSION_MAJOR >= 6
if( !(p->proj = proj_create_argv(p->proj_ctx->proj_ctx, numargs, args)) ) {
int l_pj_errno = proj_context_errno (p->proj_ctx->proj_ctx);
msSetError(MS_PROJERR, "proj error \"%s\" for \"%s\"",
"msProcessProjection()", proj_errno_string(l_pj_errno), szProjBuf) ;
return(-1);
}
#else
msAcquireLock( TLOCK_PROJ );
if( !(p->proj = pj_init(numargs, args)) ) {
int *pj_errno_ref = pj_get_errno_ref();
msReleaseLock( TLOCK_PROJ );
msSetError(MS_PROJERR, "proj error \"%s\" for \"%s\"",
"msProcessProjection()", pj_strerrno(*pj_errno_ref), szProjBuf) ;
return(-1);
}
msReleaseLock( TLOCK_PROJ );
#endif
msFreeCharArray(args, numargs);
return(0);
}
int msProcessProjection(projectionObj *p)
{
assert( p->proj == NULL );
if( strcasecmp(p->args[0],"GEOGRAPHIC") == 0 ) {
msSetError(MS_PROJERR,
"PROJECTION 'GEOGRAPHIC' no longer supported.\n"
"Provide explicit definition.\n"
"ie. proj=latlong\n"
" ellps=clrk66\n",
"msProcessProjection()");
return(-1);
}
if (strcasecmp(p->args[0], "AUTO") == 0) {
p->proj = NULL;
return 0;
}
#if PROJ_VERSION_MAJOR >= 6
if( p->proj_ctx == NULL )
{
p->proj_ctx = msProjectionContextCreate();
if( p->proj_ctx == NULL )
{
return -1;
}
}
if( p->proj_ctx->ms_proj_lib_change_counter != ms_proj_lib_change_counter )
{
msAcquireLock( TLOCK_PROJ );
p->proj_ctx->ms_proj_lib_change_counter = ms_proj_lib_change_counter;
{
const char* const paths[1] = { ms_proj_lib };
proj_context_set_search_paths(p->proj_ctx->proj_ctx, 1, ms_proj_lib ? paths : NULL);
}
msReleaseLock( TLOCK_PROJ );
}
#endif
if (strncasecmp(p->args[0], "AUTO:", 5) == 0 ||
strncasecmp(p->args[0], "AUTO2:", 6) == 0) {
/* WMS/WFS AUTO projection: "AUTO:proj_id,units_id,lon0,lat0" */
/*WMS 1.3.0: AUTO2:auto_crs_id,factor,lon0,lat0*/
return _msProcessAutoProjection(p);
}
#if PROJ_VERSION_MAJOR >= 6
{
char** args = (char**)msSmallMalloc(sizeof(char*) * (p->numargs+1));
memcpy(args, p->args, sizeof(char*) * p->numargs);
#if PROJ_VERSION_MAJOR == 6 && PROJ_VERSION_MINOR < 2
/* PROJ lookups are faster with EPSG in uppercase. Fixed in PROJ 6.2 */
/* Do that only for those versions, as it can create confusion if using */
/* a real old-style 'epsg' file... */
char szTemp[24];
if( p->numargs && strncmp(args[0], "init=epsg:", strlen("init=epsg:")) == 0 &&
strlen(args[0]) < 24)
{
strcpy(szTemp, "init=EPSG:");
strcat(szTemp, args[0] + strlen("init=epsg:"));
args[0] = szTemp;
}
#endif
args[p->numargs] = (char*) "type=crs";
if( !(p->proj = proj_create_argv(p->proj_ctx->proj_ctx, p->numargs + 1, args)) ) {
int l_pj_errno = proj_context_errno (p->proj_ctx->proj_ctx);
if(p->numargs>1) {
msSetError(MS_PROJERR, "proj error \"%s\" for \"%s:%s\"",
"msProcessProjection()", proj_errno_string(l_pj_errno), p->args[0],p->args[1]) ;
} else {
msSetError(MS_PROJERR, "proj error \"%s\" for \"%s\"",
"msProcessProjection()", proj_errno_string(l_pj_errno), p->args[0]) ;
}
free(args);
return(-1);
}
free(args);
}
#else
msAcquireLock( TLOCK_PROJ );
#if PJ_VERSION < 480
if( !(p->proj = pj_init(p->numargs, p->args)) ) {
#else
p->proj_ctx = pj_ctx_alloc();
if( !(p->proj=pj_init_ctx(p->proj_ctx, p->numargs, p->args)) ) {
#endif
int *pj_errno_ref = pj_get_errno_ref();
msReleaseLock( TLOCK_PROJ );
if(p->numargs>1) {
msSetError(MS_PROJERR, "proj error \"%s\" for \"%s:%s\"",
"msProcessProjection()", pj_strerrno(*pj_errno_ref), p->args[0],p->args[1]) ;
} else {
msSetError(MS_PROJERR, "proj error \"%s\" for \"%s\"",
"msProcessProjection()", pj_strerrno(*pj_errno_ref), p->args[0]) ;
}
return(-1);
}
msReleaseLock( TLOCK_PROJ );
#endif
#ifdef USE_PROJ_FASTPATHS
if(strcasestr(p->args[0],"epsg:4326")) {
p->wellknownprojection = wkp_lonlat;
} else if(strcasestr(p->args[0],"epsg:3857")) {
p->wellknownprojection = wkp_gmerc;
} else {
p->wellknownprojection = wkp_none;
}
#endif
return(0);
}
/************************************************************************/
/* int msIsAxisInverted */
/* Check to see if we should invert the axis. */
/* */
/************************************************************************/
int msIsAxisInverted(int epsg_code)
{
const unsigned int row = epsg_code / 8;
const unsigned char index = epsg_code % 8;
/*check the static table*/
if ((row < sizeof(axisOrientationEpsgCodes)) && (axisOrientationEpsgCodes[row] & (1 << index)))
return MS_TRUE;
else
return MS_FALSE;
}
/************************************************************************/
/* msProjectPoint() */
/************************************************************************/
int msProjectPoint(projectionObj *in, projectionObj *out, pointObj *point)
{
int ret;
reprojectionObj* reprojector = msProjectCreateReprojector(in, out);
if( !reprojector )
return MS_FAILURE;
ret = msProjectPointEx(reprojector, point);
msProjectDestroyReprojector(reprojector);
return ret;
}
/************************************************************************/
/* msProjectPointEx() */
/************************************************************************/
int msProjectPointEx(reprojectionObj* reprojector, pointObj *point)
{
projectionObj* in = reprojector->in;
projectionObj* out = reprojector->out;
if( in && in->gt.need_geotransform ) {
double x_out, y_out;
x_out = in->gt.geotransform[0]
+ in->gt.geotransform[1] * point->x
+ in->gt.geotransform[2] * point->y;
y_out = in->gt.geotransform[3]
+ in->gt.geotransform[4] * point->x
+ in->gt.geotransform[5] * point->y;
point->x = x_out;
point->y = y_out;
}
#if PROJ_VERSION_MAJOR >= 6
if( reprojector->pj ) {
PJ_COORD c;
c.xyzt.x = point->x;
c.xyzt.y = point->y;
c.xyzt.z = 0;
c.xyzt.t = 0;
c = proj_trans (reprojector->pj, PJ_FWD, c);
if( c.xyzt.x == HUGE_VAL || c.xyzt.y == HUGE_VAL ) {
return MS_FAILURE;
}
point->x = c.xyzt.x;
point->y = c.xyzt.y;
}
#else
if( reprojector->no_op ) {
/* do nothing, no transformation required */
}
/* -------------------------------------------------------------------- */
/* If we have a fully defined input coordinate system and */
/* output coordinate system, then we will use pj_transform. */
/* -------------------------------------------------------------------- */
else if( in && in->proj && out && out->proj ) {
int error;
double z = 0.0;
if( pj_is_latlong(in->proj) ) {