メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.368983362277 43.7459635365911, 142.36863001358 43.745548726609, 142.369653574614 43.7450893701255, 142.370513310051 43.7447096237407, 142.371024770915 43.7444840352257, 142.370655659698 43.7451408610468, 142.370512031653 43.7452485697837, 142.370366064876 43.7453445198821, 142.368983362277 43.7459635365911)) ^^http://www.opengis.net/ont/geosparql#wktLiteral