メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6000000 32.5041667, 130.6062500 32.5041667, 130.6062500 32.5083333, 130.6000000 32.5083333, 130.6000000 32.5041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral