メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.265946966769 44.0232559742208, 144.265549370895 44.0238708068073, 144.263378770897 44.0231975283657, 144.263775849938 44.0226473814508, 144.26407134902 44.022711769224, 144.264735854984 44.022858661941, 144.265494722175 44.0231098582327, 144.265946966769 44.0232559742208)) ^^http://www.opengis.net/ont/geosparql#wktLiteral