メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.0062500 34.5541667, 136.0125000 34.5541667, 136.0125000 34.5583333, 136.0062500 34.5583333, 136.0062500 34.5541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral