code: public BoundingBox getBoundingBox() {
  
  		GenericRawResults<Object[]> results = null;
  		Object[] values = null;
  		try {
  			results = geometryIndexDao.queryRaw("SELECT MIN("
  					+ GeometryIndex.COLUMN_MIN_X + "), MIN("
  					+ GeometryIndex.COLUMN_MIN_Y + "), MAX("
  					+ GeometryIndex.COLUMN_MAX_X + "), MAX("
  					+ GeometryIndex.COLUMN_MAX_Y + ") FROM "
  					+ GeometryIndex.TABLE_NAME + " WHERE "
  					+ GeometryIndex.COLUMN_TABLE_NAME + " = ?", new DataType[] {
  					DataType.DOUBLE, DataType.DOUBLE, DataType.DOUBLE,
  					DataType.DOUBLE }, tableName);
  			values = results.getFirstResult();
  		} catch (SQLException e) {
  			throw new GeoPackageException(
  					"Failed to query for indexed feature bounds: " + tableName,
  					e);
  		} finally {
  			if (results != null) {
  				try {
  					results.close();
  				} catch (IOException e) {
  					logger.log(Level.WARNING,
  							"Failed to close bounds query results", e);
  				}
  			}
  		}
  
  		BoundingBox boundingBox = new BoundingBox((double) values[0],
  				(double) values[1], (double) values[2], (double) values[3]);
  
  		return boundingBox;
  	}
docs: Query for the bounds of the feature table index
  
  @return bounding box
  @since 3.1.0