メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.2625000 36.0291667, 140.2687500 36.0291667, 140.2687500 36.0333333, 140.2625000 36.0333333, 140.2625000 36.0291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral