メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4437500 34.6000000, 133.4500000 34.6000000, 133.4500000 34.6041667, 133.4437500 34.6041667, 133.4437500 34.6000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral