メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.369558920382 45.1251985075482, 142.369249626796 45.1264104544264, 142.369063058454 45.1263910360594, 142.368932941907 45.1263775348418, 142.367575332899 45.1262363138233, 142.367664234865 45.1258404746801, 142.367785319153 45.125435743104, 142.367856570765 45.1249814304353, 142.369297029539 45.1251664989783, 142.369558920382 45.1251985075482)) ^^http://www.opengis.net/ont/geosparql#wktLiteral