メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.393555181026 43.0332997029143, 141.393280561418 43.0337235007133, 141.393025717674 43.0341383732369, 141.393118493944 43.034167902681, 141.392836507255 43.0345970590696, 141.39253237956 43.0344814101865, 141.391913002215 43.0342640216774, 141.391023429497 43.033945929448, 141.391290486804 43.0335429694696, 141.391537843864 43.0331570906779, 141.39184497191 43.0327125121694, 141.392458460692 43.0329247930942, 141.393100410227 43.0331451607111, 141.393555181026 43.0332997029143)) ^^http://www.opengis.net/ont/geosparql#wktLiteral