メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.748146783599 43.2029916028646, 141.748554579456 43.2031990980146, 141.747837160637 43.2039714613266, 141.747211121955 43.2046246629577, 141.746795935476 43.2044151599363, 141.746349253261 43.2041897643898, 141.746971010261 43.2035375335514, 141.747707617829 43.2027647684138, 141.748117255151 43.202975860423, 141.748146783599 43.2029916028646)) ^^http://www.opengis.net/ont/geosparql#wktLiteral