メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.894485283461 43.0192130116732, 142.893593663754 43.019974054666, 142.893523718653 43.0200405559022, 142.891981161589 43.0190932838386, 142.892036165273 43.0190461368409, 142.892936900369 43.0182666948643, 142.894485283461 43.0192130116732)) ^^http://www.opengis.net/ont/geosparql#wktLiteral