メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.0500000 32.8458334, 130.0562500 32.8458334, 130.0562500 32.8500000, 130.0500000 32.8500000, 130.0500000 32.8458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral