メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9437500 32.3125000, 130.9500000 32.3125000, 130.9500000 32.3166667, 130.9437500 32.3166667, 130.9437500 32.3125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral