メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.7500000 35.0125000, 135.7562500 35.0125000, 135.7562500 35.0166667, 135.7500000 35.0166667, 135.7500000 35.0125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral