メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.372483955299 43.1117486282224, 141.372408726923 43.1120015069798, 141.372308584074 43.1123720605874, 141.370686036767 43.112173815233, 141.370793885902 43.1117618998637, 141.370857164445 43.1115060470984, 141.37095862141 43.1110844485653, 141.372569511129 43.1113240225206, 141.372483955299 43.1117486282224)) ^^http://www.opengis.net/ont/geosparql#wktLiteral