メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.77756966394 42.9102975705986, 140.773958724943 42.9104280707633, 140.77373821131 42.9079016377519, 140.773563852211 42.9054583683026, 140.777136064192 42.9052819352205, 140.77756966394 42.9102975705986)) ^^http://www.opengis.net/ont/geosparql#wktLiteral