メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.392163233719 44.1739688378424, 142.391754127776 44.1739018226743, 142.391044093732 44.1737867598327, 142.390428907778 44.173683918315, 142.390699002514 44.1726540293158, 142.392433911265 44.1729282030224, 142.392163233719 44.1739688378424)) ^^http://www.opengis.net/ont/geosparql#wktLiteral