メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.910499147084 43.5030652366157, 141.91043364033 43.5028216426062, 141.910017421629 43.5014155298306, 141.910102611027 43.5014016831396, 141.911006491688 43.5012546812747, 141.911870361265 43.5011141996876, 141.912369126579 43.5027789997664, 141.910499147084 43.5030652366157)) ^^http://www.opengis.net/ont/geosparql#wktLiteral