メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.331960820796 43.069792168096, 141.331374886033 43.0700556256261, 141.330328679475 43.0699274407269, 141.330525084464 43.0691548366731, 141.330617277968 43.0687759413276, 141.331398598772 43.0688983379721, 141.332167014343 43.0689986821197, 141.331960820796 43.069792168096)) ^^http://www.opengis.net/ont/geosparql#wktLiteral