@staticmethod
def get_geom_str(osgeo_geom, str_type='wkt'):
    """
        Method to return a geometry string from an osgeo geometry object
        :param osgeo_geom: OSGEO geometry object
        :param str_type: 'wkt', 'json', or 'wkb
        :return: wkt, json or wkb
        """
    if str_type == 'wkt':
        try:
            return osgeo_geom.ExportToWkt()
        except:
            return
    elif str_type == 'json':
        try:
            return osgeo_geom.ExportToJson()
        except:
            return
    elif str_type == 'wkb':
        try:
            return osgeo_geom.ExportToWkb()
        except:
            return
    else:
        raise ValueError('Unsupported geometry type')
