メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.32002975862 43.0709873852608, 141.319420588289 43.0706271994116, 141.319654672081 43.0704737459186, 141.320457602199 43.0699778398034, 141.320885902271 43.0703283226515, 141.32002975862 43.0709873852608)) ^^http://www.opengis.net/ont/geosparql#wktLiteral