メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9937500 34.1041667, 131.0000000 34.1041667, 131.0000000 34.1083333, 130.9937500 34.1083333, 130.9937500 34.1041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral