メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.335589958816 43.7478852799338, 142.335276096341 43.7477850991522, 142.334790921104 43.7486538277787, 142.33478852623 43.7486531086009, 142.33416059857 43.7484621686847, 142.334654523751 43.7476009603252, 142.335062959794 43.7468784879827, 142.33569470497 43.7470493265285, 142.336007322906 43.7471429479344, 142.335589958816 43.7478852799338)) ^^http://www.opengis.net/ont/geosparql#wktLiteral