メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.916903743416 43.4969049029991, 141.918951052232 43.4965685408265, 141.919211776044 43.4973390573653, 141.919103900428 43.4978565244103, 141.91893474473 43.4982348130909, 141.916413699277 43.4986505603121, 141.916209597329 43.497952816676, 141.91615197812 43.497755839151, 141.915944260712 43.4970535142585, 141.915935774202 43.4970247961898, 141.916903743416 43.4969049029991)) ^^http://www.opengis.net/ont/geosparql#wktLiteral