メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.685723572724 35.3176668583262, 136.686124194723 35.3194202626578, 136.684493671896 35.318131771367, 136.683875551571 35.3176477050008, 136.684416266239 35.3172480935077, 136.684806394388 35.316965558029, 136.685723572724 35.3176668583262)) ^^http://www.opengis.net/ont/geosparql#wktLiteral