メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.826437216709 35.5149926519298, 137.826411419269 35.5150073280557, 137.826596144328 35.5152621877807, 137.825594679636 35.5157826557274, 137.825177398526 35.5152717487233, 137.825733134849 35.5149999069475, 137.826237066245 35.514733848804, 137.826437216709 35.5149926519298)) ^^http://www.opengis.net/ont/geosparql#wktLiteral