メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.293473718643 43.0711005608942, 141.292552209405 43.0716061879083, 141.292372820646 43.0717046241322, 141.292007656355 43.071905030568, 141.29162661787 43.0721142339861, 141.290896717725 43.071527202207, 141.290698565337 43.0713586502481, 141.291615479888 43.0708530704563, 141.292511511625 43.0703384473064, 141.29271004912 43.070482454152, 141.293473718643 43.0711005608942)) ^^http://www.opengis.net/ont/geosparql#wktLiteral