メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.909136089475 43.501558829277, 141.908441362253 43.5016717729317, 141.908060114634 43.5003945986475, 141.908088437445 43.5003955969578, 141.908868709977 43.5004505302858, 141.909136089475 43.501558829277)) ^^http://www.opengis.net/ont/geosparql#wktLiteral