Function msLoadProjectionString

mapfile.c:1338–1583

int msLoadProjectionString(projectionObj *p, const char *value)
{
  p->gt.need_geotransform = MS_FALSE;

#ifdef USE_PROJ
  if(p) msFreeProjection(p);


  /*
   * Handle new style definitions, the same as they would be given to
   * the proj program.  
   * eg. 
   *    "+proj=utm +zone=11 +ellps=WGS84"
   */
  if( value[0] == '+' )
  {
      char 	*trimmed;
      int	i, i_out=0;

      trimmed = msStrdup(value+1);
      for( i = 1; value[i] != '\0'; i++ )
      {
          if( !isspace( value[i] ) )
              trimmed[i_out++] = value[i];
      }
      trimmed[i_out] = '\0';
      
      p->args = msStringSplit(trimmed,'+', &p->numargs);
      free( trimmed );
  }
  else if (strncasecmp(value, "AUTO:", 5) == 0 ||
           strncasecmp(value, "AUTO2:", 6) == 0)
  {
     /* WMS/WFS AUTO projection: "AUTO:proj_id,units_id,lon0,lat0" */
     /* WMS 1.3.0 projection: "AUTO2:auto_crs_id,factor,lon0,lat0"*/
     /* Keep the projection defn into a single token for writeProjection() */
     /* to work fine. */
      p->args = (char**)msSmallMalloc(sizeof(char*));
      p->args[0] = msStrdup(value);
      p->numargs = 1;
  }
  else if (strncasecmp(value, "EPSG:", 5) == 0)
  {
      size_t buffer_size = 10 + strlen(value+5) + 1;
      char *init_string = (char*)msSmallMalloc(buffer_size);

      /* translate into PROJ.4 format. */
      snprintf( init_string, buffer_size, "init=epsg:%s", value+5);

      p->args = (char**)msSmallMalloc(sizeof(char*) * 2);
      p->args[0] = init_string;
      p->numargs = 1;
  }
  else if (strncasecmp(value, "urn:ogc:def:crs:EPSG:",21) == 0)
  { /* this is very preliminary urn support ... expand later */ 
      size_t buffer_size = 0;
      char *init_string =  NULL;
      const char *code;