メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.449287457819 42.9255542329406, 143.44981881661 42.9255905423573, 143.449801492225 42.9257276070023, 143.449680935832 42.9266845816341, 143.449503915185 42.926671939169, 143.449328653763 42.9266594229202, 143.44919919381 42.92665017655, 143.449146738581 42.9266464306247, 143.448972147078 42.9266339608207, 143.448605109998 42.9266077257419, 143.448614929919 42.9265343192785, 143.448639934887 42.9263473054671, 143.448748995759 42.9255157098332, 143.449287457819 42.9255542329406)) ^^http://www.opengis.net/ont/geosparql#wktLiteral