メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.703130903509 44.3596466804302, 141.701996854196 44.3603775041561, 141.70198674595 44.3603840284825, 141.70097253493 44.359582549688, 141.700986585656 44.3595735144505, 141.701522910078 44.359229335812, 141.702088510204 44.3596708554599, 141.702685539774 44.3592798190198, 141.702733781387 44.359319567461, 141.703130903509 44.3596466804302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral