メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.367131000642 43.1019468155966, 141.367433083134 43.1019838840664, 141.36731779844 43.1024785840971, 141.367006822978 43.1024391266564, 141.366599755959 43.1023875346899, 141.366280768861 43.1023444970476, 141.36625504059 43.1023383205645, 141.366368276627 43.1018530989244, 141.367131000642 43.1019468155966)) ^^http://www.opengis.net/ont/geosparql#wktLiteral