メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.295311020622 43.0700836135605, 141.294693981858 43.0704251160729, 141.294439306616 43.0705661091375, 141.294113027021 43.0707466620624, 141.293473718643 43.0711005608942, 141.29271004912 43.070482454152, 141.293913582534 43.0698092687134, 141.294539489038 43.0694771976582, 141.295311020622 43.0700836135605)) ^^http://www.opengis.net/ont/geosparql#wktLiteral