メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6625000 32.6041667, 130.6687500 32.6041667, 130.6687500 32.6083333, 130.6625000 32.6083333, 130.6625000 32.6041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral