メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351382003503 43.1162484744413, 141.35131015103 43.1165655673739, 141.351223871415 43.1169956978929, 141.351160223648 43.1172442887268, 141.349964315832 43.1170928186955, 141.350117951358 43.1164434530193, 141.350118080565 43.1164346631926, 141.350196831972 43.1160926603168, 141.350286763368 43.1157018703471, 141.351469871545 43.1158604092109, 141.351382003503 43.1162484744413)) ^^http://www.opengis.net/ont/geosparql#wktLiteral