メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.326357896581 43.0557726992405, 141.326074007099 43.0557412194839, 141.32575529372 43.0556977125255, 141.325584163625 43.0556743867566, 141.325375134111 43.0556458319755, 141.324685537172 43.0555460835404, 141.324722978457 43.0553905369544, 141.324845141097 43.0548947899248, 141.324933709189 43.0544963883736, 141.324981028636 43.0542961214919, 141.325875604458 43.054495000298, 141.326338880173 43.0545996646007, 141.326248363943 43.0549240657873, 141.326565369805 43.0549916805548, 141.326357896581 43.0557726992405)) ^^http://www.opengis.net/ont/geosparql#wktLiteral