メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.769722916117 43.2090867846398, 140.771671973208 43.2091150399648, 140.771660993236 43.2095099992374, 140.771623716902 43.2102175048408, 140.770465727382 43.2101931652406, 140.769688335131 43.2101869673287, 140.767344555702 43.2101550393354, 140.767353653166 43.2094061629273, 140.767383414007 43.2090506188849, 140.769722916117 43.2090867846398)) ^^http://www.opengis.net/ont/geosparql#wktLiteral