メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.769038887519 43.2092047405405, 141.76858216056 43.2097165698741, 141.768123533145 43.2098698531167, 141.767657063758 43.2093694750259, 141.76751666305 43.2092199966164, 141.767324670985 43.2089006721695, 141.767337786177 43.2088408074134, 141.76765295107 43.2084989341487, 141.768567180943 43.2089670180937, 141.769038887519 43.2092047405405)) ^^http://www.opengis.net/ont/geosparql#wktLiteral