メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.874505579209 43.0125782378347, 142.874462608238 43.0125512547574, 142.874427162768 43.0125289424092, 142.87331740347 43.0118750102847, 142.873492456876 43.0117242577563, 142.874278919008 43.0110654247548, 142.875243887522 43.0116460809661, 142.875432533512 43.0117584927801, 142.874505579209 43.0125782378347)) ^^http://www.opengis.net/ont/geosparql#wktLiteral