メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.5937500 33.6208334, 133.6000000 33.6208334, 133.6000000 33.6250000, 133.5937500 33.6250000, 133.5937500 33.6208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral