メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.878024114918 43.0192444499477, 142.87795863671 43.0192056347112, 142.878004600913 43.0190417269966, 142.878160298497 43.018486750763, 142.878302841063 43.0179908525863, 142.878327880777 43.0179086420458, 142.879074636834 43.0183466380637, 142.878154293383 43.0191335313091, 142.878024114918 43.0192444499477)) ^^http://www.opengis.net/ont/geosparql#wktLiteral