メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.447802240681 40.5124592515601, 141.445747454306 40.5118708661912, 141.444746306215 40.5115670907754, 141.444924904308 40.5112062569673, 141.44519584465 40.5106961940032, 141.445229838342 40.5105774568177, 141.445712515101 40.5096370738685, 141.446211769139 40.5086659939392, 141.448380826169 40.5092758956348, 141.449243911911 40.5095496302583, 141.448764175056 40.510518858122, 141.448279846672 40.5115215291222, 141.447802240681 40.5124592515601)) ^^http://www.opengis.net/ont/geosparql#wktLiteral