メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.569986437088 42.8827913704402, 141.570708916823 42.8827619072078, 141.571235552526 42.8833774832726, 141.57156444284 42.8836232048817, 141.573022041445 42.8844841245173, 141.572608725646 42.8848353721477, 141.571626239704 42.8856684598331, 141.571275289908 42.8854973002864, 141.570452548154 42.8851683951216, 141.569669773242 42.8848543506863, 141.569146076417 42.8846597904795, 141.568486559523 42.8844578067597, 141.568805483443 42.8838820038472, 141.568913877763 42.8836871986066, 141.569165880096 42.8831736610981, 141.569363429402 42.8827805585021, 141.569986437088 42.8827913704402)) ^^http://www.opengis.net/ont/geosparql#wktLiteral