メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.561724770734 42.9744458975308, 141.561160141728 42.9744165515985, 141.561143742447 42.9744743360814, 141.560262736 42.9744294387798, 141.560244452624 42.974428484269, 141.55875832418 42.9743184607294, 141.558817664366 42.9739412784076, 141.558823420331 42.973833424122, 141.558908748415 42.973594599635, 141.559182609217 42.9731163079505, 141.559324026571 42.9729361977371, 141.561807706365 42.9737974455462, 141.561724770734 42.9744458975308)) ^^http://www.opengis.net/ont/geosparql#wktLiteral