メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343223556538 43.0438231876818, 141.343193319174 43.0441184744696, 141.343147682038 43.0443393701942, 141.341706929024 43.0442380584667, 141.341775893332 43.0437166178078, 141.341785748349 43.0436855392987, 141.34185522018 43.0431295696939, 141.342423892638 43.0431639023583, 141.343305496421 43.0432206166988, 141.343314479147 43.0432552195921, 141.343249330475 43.0436747847675, 141.343223556538 43.0438231876818)) ^^http://www.opengis.net/ont/geosparql#wktLiteral