メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355903730913 43.1301383037626, 141.356055481482 43.1305715811052, 141.356196766724 43.1309389498447, 141.356321888957 43.1313151945581, 141.356457157301 43.1316871585725, 141.355728204932 43.1318089823055, 141.355142922692 43.1319094180365, 141.354902724178 43.1311802131005, 141.354793234742 43.1308059878533, 141.354559760741 43.1301761384051, 141.354596711245 43.1301508980956, 141.354957036005 43.1299557363642, 141.355422966253 43.1296822072762, 141.355903730913 43.1301383037626)) ^^http://www.opengis.net/ont/geosparql#wktLiteral