メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.409826833848 43.1238862879826, 141.410528051617 43.124360703396, 141.409998091959 43.1254162929708, 141.409585420264 43.1262357381315, 141.40932650297 43.1267790119873, 141.407845379655 43.1260479283557, 141.40682051125 43.1255713584128, 141.407374959329 43.1249670707266, 141.40790611461 43.1243941820619, 141.408447638579 43.1238065253976, 141.408922284872 43.123277935102, 141.408968472468 43.1233124568417, 141.409826833848 43.1238862879826)) ^^http://www.opengis.net/ont/geosparql#wktLiteral