メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.138703718468 42.9838910478901, 144.137905785021 42.9845234642822, 144.132868801323 42.9823610767243, 144.134003696082 42.9810873742746, 144.134132612391 42.9809426937429, 144.134465151053 42.9813055301486, 144.135265784227 42.9817837991313, 144.136405055422 42.9824849070367, 144.137530911341 42.9831787702589, 144.137965519794 42.9834265415778, 144.138703718468 42.9838910478901)) ^^http://www.opengis.net/ont/geosparql#wktLiteral