メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.346522690618 43.1139348226124, 141.347078905535 43.1140037445184, 141.3477643793 43.1140952660603, 141.347755553754 43.1141209356915, 141.347611251676 43.1147153778272, 141.347504544593 43.1151687643937, 141.347453875441 43.115350014051, 141.346982706771 43.1152935754896, 141.346767081563 43.1152625587221, 141.346248048869 43.1151969472154, 141.345553472088 43.1150947560685, 141.345700570827 43.1144687005305, 141.34570295001 43.1144571155507, 141.345856605457 43.1138419409755, 141.34621801745 43.1138886133397, 141.346522690618 43.1139348226124)) ^^http://www.opengis.net/ont/geosparql#wktLiteral