メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.311696383402 43.0904282305373, 141.311324169313 43.090647134154, 141.310393971308 43.089790698795, 141.310915257628 43.0894805403662, 141.31119203742 43.0893149383199, 141.311507289291 43.089137061902, 141.31244262308 43.0899968359249, 141.312056367593 43.0902181581832, 141.311696383402 43.0904282305373)) ^^http://www.opengis.net/ont/geosparql#wktLiteral