メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.2687500 35.0541667, 135.2750000 35.0541667, 135.2750000 35.0583333, 135.2687500 35.0583333, 135.2687500 35.0541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral