メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.5437500 33.6041667, 133.5500000 33.6041667, 133.5500000 33.6083333, 133.5437500 33.6083333, 133.5437500 33.6041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral