メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7125000 33.9000000, 130.7187500 33.9000000, 130.7187500 33.9041667, 130.7125000 33.9041667, 130.7125000 33.9000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral