メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.91073325315 43.5098782461538, 141.910262140644 43.5099525883541, 141.909614977564 43.5100534426925, 141.909364851578 43.5091637401348, 141.909099148601 43.5081766940173, 141.909697017602 43.5080846266848, 141.910179493655 43.5080103217638, 141.910495087785 43.5090625302427, 141.91073325315 43.5098782461538)) ^^http://www.opengis.net/ont/geosparql#wktLiteral