メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.0562500 33.8541667, 136.0625000 33.8541667, 136.0625000 33.8583333, 136.0562500 33.8583333, 136.0562500 33.8541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral