メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.420827536878 43.7546614002858, 142.420828826639 43.7546842883968, 142.420853850649 43.7551276129337, 142.4195363836 43.7552019863502, 142.419498640282 43.7547415222265, 142.419522597437 43.7547402745829, 142.419486617745 43.7542692764424, 142.420773121745 43.754192961784, 142.420827536878 43.7546614002858)) ^^http://www.opengis.net/ont/geosparql#wktLiteral