メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767724790364 43.2055992535633, 141.767406236581 43.2059583453907, 141.767110015639 43.2062646410187, 141.766149953731 43.2057938199235, 141.766465068399 43.2054570825258, 141.766751362682 43.2051476526366, 141.766781010459 43.2051187300868, 141.76680382641 43.2050964635888, 141.767766926745 43.2055591335568, 141.767724790364 43.2055992535633)) ^^http://www.opengis.net/ont/geosparql#wktLiteral