メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.2125000 33.5000000, 130.2187500 33.5000000, 130.2187500 33.5041667, 130.2125000 33.5041667, 130.2125000 33.5000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral