メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.261141468297 43.1327692144669, 141.261404888094 43.1325891963855, 141.261609726161 43.1324510800282, 141.262112912421 43.1321162965603, 141.262797745285 43.1327199263721, 141.263385807139 43.1332928993213, 141.262018924824 43.1342911784418, 141.261480592799 43.1346606116344, 141.260952491217 43.135038358344, 141.25942955051 43.1339035209791, 141.259983317814 43.1335181262794, 141.260486316163 43.1331960076582, 141.260568170424 43.1331458666176, 141.261007096395 43.1328486507276, 141.261141468297 43.1327692144669)) ^^http://www.opengis.net/ont/geosparql#wktLiteral