メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.369686302949 43.0953381862089, 141.369592071187 43.0957121581672, 141.369475133032 43.0961235097523, 141.367968551299 43.0959216770351, 141.368058176379 43.0955016774187, 141.368146623463 43.0951368035186, 141.368246311882 43.0947709612349, 141.369776675047 43.09498563387, 141.369686302949 43.0953381862089)) ^^http://www.opengis.net/ont/geosparql#wktLiteral