メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.9437500 34.5166667, 133.9500000 34.5166667, 133.9500000 34.5208334, 133.9437500 34.5208334, 133.9437500 34.5166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral