docs: public int getSridFromCrs(String crs) {
  		int crsInt;
  		if (crs.indexOf(':') != -1) {
  			crsInt = Integer.parseInt(crs.substring(crs.indexOf(':') + 1));
  		} else {
  			try {
  				crsInt = Integer.parseInt(crs);
  			} catch (NumberFormatException e) {
  				crsInt = 0;
  			}
  		}
  		return crsInt;
  	}