メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.524147472918 39.2238084779147, 140.523599653298 39.2231487150315, 140.524305950335 39.2227617423978, 140.523720160423 39.2220863956353, 140.524442610879 39.2217419041099, 140.525566661338 39.2230992174279, 140.524147472918 39.2238084779147)) ^^http://www.opengis.net/ont/geosparql#wktLiteral