メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.338954422201 43.7466278133375, 142.338744785519 43.7469965330365, 142.3384815418 43.7474279513435, 142.338252551679 43.7478301756497, 142.337952439401 43.7477369545491, 142.337386209367 43.7475530848945, 142.337119229557 43.7474691187013, 142.337348857296 43.7470805384026, 142.337602331887 43.7466472492606, 142.337820922254 43.7462720556743, 142.338020102499 43.7458806667034, 142.339176573825 43.7462409063375, 142.339167049993 43.7462569458133, 142.338954422201 43.7466278133375)) ^^http://www.opengis.net/ont/geosparql#wktLiteral