メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.910017421629 43.5014155298306, 141.909136089475 43.501558829277, 141.908868709977 43.5004505302858, 141.909798851991 43.5005145252075, 141.909806763256 43.5005376158434, 141.910102611027 43.5014016831396, 141.910017421629 43.5014155298306)) ^^http://www.opengis.net/ont/geosparql#wktLiteral