メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.344638595834 43.0647385657168, 141.344034905112 43.0646647192381, 141.342976224005 43.0645222053826, 141.343185515061 43.0637939161562, 141.343294754261 43.0633263173763, 141.344997442889 43.0635449605266, 141.344734593909 43.0641206367215, 141.344639580291 43.064391497175, 141.344613648178 43.0644654184487, 141.344638595834 43.0647385657168)) ^^http://www.opengis.net/ont/geosparql#wktLiteral