メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.440377480259 38.4408889374254, 141.440120493613 38.4408547923291, 141.439400747803 38.4408041740434, 141.438985995443 38.440850940633, 141.438627728994 38.4407020234224, 141.438574833671 38.4402463390481, 141.438731514797 38.4397633904283, 141.439324096281 38.4398048146902, 141.440188115436 38.4399173296083, 141.440849882117 38.4400449619939, 141.440868765613 38.4400503545128, 141.440377480259 38.4408889374254)) ^^http://www.opengis.net/ont/geosparql#wktLiteral