メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767324670985 43.2089006721695, 141.76671043797 43.2091447225256, 141.76638342739 43.2089698415766, 141.76674042816 43.2086577551088, 141.767188137224 43.2082664399353, 141.767203172356 43.2082742387605, 141.76765295107 43.2084989341487, 141.767337786177 43.2088408074134, 141.767324670985 43.2089006721695)) ^^http://www.opengis.net/ont/geosparql#wktLiteral