メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356783552374 43.0823888350507, 141.356729604113 43.0826149415231, 141.35664735714 43.0829593309419, 141.355067385997 43.0827542759683, 141.355211228659 43.0821735024855, 141.355357708688 43.081602454614, 141.35616815137 43.0817090816392, 141.356925544935 43.0818087484905, 141.356783552374 43.0823888350507)) ^^http://www.opengis.net/ont/geosparql#wktLiteral