メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.817323646807 37.0666878663397, 136.809143634293 37.0621621349169, 136.813253696952 37.0594077134676, 136.81651785373 37.0595256279131, 136.81679642684 37.0595357447812, 136.817624670274 37.0596968066478, 136.819776812292 37.0606813686276, 136.821603534669 37.0615170303687, 136.819404939677 37.0637457135554, 136.818040670113 37.0654152200601, 136.817323646807 37.0666878663397)) ^^http://www.opengis.net/ont/geosparql#wktLiteral