メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.379584527228 42.9836638098711, 144.379610927866 42.9836683113079, 144.38119727206 42.9839434003372, 144.381219627254 42.9839472026656, 144.381072215819 42.9843990612872, 144.380257115182 42.9842452597812, 144.380203375423 42.9843976757567, 144.379402546726 42.9842576684174, 144.378615775212 42.9841251990628, 144.378808421591 42.9835348714124, 144.379584527228 42.9836638098711)) ^^http://www.opengis.net/ont/geosparql#wktLiteral