メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.8937500 34.6541667, 133.9000000 34.6541667, 133.9000000 34.6583333, 133.8937500 34.6583333, 133.8937500 34.6541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral