メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6812500 32.8000000, 132.6875000 32.8000000, 132.6875000 32.8041667, 132.6812500 32.8041667, 132.6812500 32.8000000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral