メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.847175662637 37.6569577328149, 138.845570302449 37.6575017843499, 138.844608249268 37.6557094040009, 138.843698175935 37.6560174169645, 138.840303236369 37.6571754836596, 138.83966698175 37.6573889134042, 138.839181701176 37.6564629370759, 138.841112465959 37.6558096293334, 138.840651585449 37.6549010467898, 138.84159041242 37.6545781918261, 138.845249652744 37.6533425832409, 138.845961418323 37.6546855928303, 138.847100015057 37.6568229386153, 138.847175662637 37.6569577328149)) ^^http://www.opengis.net/ont/geosparql#wktLiteral