メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.916645104707 43.4994426915675, 141.916630291396 43.4993918376542, 141.916543163014 43.4990931870432, 141.916413699277 43.4986505603121, 141.91893474473 43.4982348130909, 141.919103900428 43.4978565244103, 141.919211776044 43.4973390573653, 141.918951052232 43.4965685408265, 141.920377198885 43.4963415732573, 141.9205358738 43.4979290923722, 141.920555954616 43.4981300743737, 141.920631080673 43.4987452625215, 141.916645104707 43.4994426915675)) ^^http://www.opengis.net/ont/geosparql#wktLiteral