メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.333101461691 43.1204671349981, 141.332589226216 43.1199622979779, 141.331714645274 43.1190809024682, 141.3317172577 43.1190795164742, 141.332441606664 43.1186886916556, 141.333161948874 43.1183019090574, 141.3335074874 43.118653991689, 141.33383638456 43.1189892016394, 141.33417057746 43.1193233273036, 141.334526719859 43.1196794988625, 141.333101461691 43.1204671349981)) ^^http://www.opengis.net/ont/geosparql#wktLiteral