メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.412058501945 43.0341523241093, 141.412354548137 43.034519365753, 141.411011212249 43.03506605857, 141.410730729034 43.0346971587203, 141.410475063799 43.0343223914289, 141.410218807064 43.0339912246586, 141.410076370058 43.0340313234, 141.409776582986 43.0336234570149, 141.410634847307 43.0332557320869, 141.411181434148 43.0330284194848, 141.412058501945 43.0341523241093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral