メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.38119727206 42.9839434003372, 144.379610927866 42.9836683113079, 144.379584527228 42.9836638098711, 144.378808421591 42.9835348714124, 144.379005926264 42.9829300347015, 144.38138013279 42.9833533210703, 144.38119727206 42.9839434003372)) ^^http://www.opengis.net/ont/geosparql#wktLiteral