メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.916903743416 43.4969049029991, 141.915935774202 43.4970247961898, 141.915736120763 43.4963497087579, 141.91569416188 43.496207842663, 141.92022180187 43.4955192517049, 141.920333401987 43.4961098607445, 141.920377198885 43.4963415732573, 141.918951052232 43.4965685408265, 141.916903743416 43.4969049029991)) ^^http://www.opengis.net/ont/geosparql#wktLiteral