メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.362406520183 43.1165999253452, 141.362274990132 43.1172030639456, 141.360817947562 43.1170112985918, 141.360958965055 43.1164170981937, 141.361089349893 43.1158806215684, 141.361500037398 43.1159338810628, 141.3619089583 43.1159831872906, 141.362548408454 43.1160702156864, 141.362406520183 43.1165999253452)) ^^http://www.opengis.net/ont/geosparql#wktLiteral