メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.5125000 33.5458334, 135.5187500 33.5458334, 135.5187500 33.5500000, 135.5125000 33.5500000, 135.5125000 33.5458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral