メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.7812500 34.3583333, 135.7875000 34.3583333, 135.7875000 34.3625000, 135.7812500 34.3625000, 135.7812500 34.3583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral