メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.033245765097 43.5654519356011, 142.032568817594 43.5654038639517, 142.032714230301 43.5644072365268, 142.032947524406 43.563066952897, 142.033629633299 43.5631176726544, 142.033564832543 43.5635378163381, 142.033478290571 43.5639599239881, 142.033245765097 43.5654519356011)) ^^http://www.opengis.net/ont/geosparql#wktLiteral