メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.9875000 34.2541667, 133.9937500 34.2541667, 133.9937500 34.2583333, 133.9875000 34.2583333, 133.9875000 34.2541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral