メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.34271128639 43.0226553305484, 141.342646486426 43.0227662203985, 141.342084150144 43.0226078035343, 141.342335547793 43.0224273611096, 141.343213311616 43.021428101477, 141.343340442249 43.021471519433, 141.342999939236 43.0221122747878, 141.34271128639 43.0226553305484)) ^^http://www.opengis.net/ont/geosparql#wktLiteral