メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.184165371177 34.8129141548829, 137.182922115414 34.8128579713228, 137.180339981659 34.8127455757655, 137.179752514019 34.8127118285404, 137.179574899373 34.8126667719406, 137.179369960263 34.8125653756752, 137.180039317754 34.8117314506316, 137.180708668775 34.811190503122, 137.180995556672 34.8111341312826, 137.182020141761 34.8108635778541, 137.183085691676 34.8105254002604, 137.183358918828 34.8104802926185, 137.184501304988 34.8104828189747, 137.184165371177 34.8129141548829)) ^^http://www.opengis.net/ont/geosparql#wktLiteral