code: private SpatialReferenceSystem getSrs(long srsId) {
  		SpatialReferenceSystem srs;
  		try {
  			srs = getSpatialReferenceSystemDao().queryForId(srsId);
  		} catch (SQLException e1) {
  			throw new GeoPackageException(
  					"Failed to retrieve Spatial Reference System. SRS ID: "
  							+ srsId);
  		}
  		if (srs == null) {
  			throw new GeoPackageException(
  					"Spatial Reference System could not be found. SRS ID: "
  							+ srsId);
  		}
  		return srs;
  	}
docs: Get the Spatial Reference System by id
  
  @param srsId
  @return