メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.368573812918 34.8194269502228, 137.370140630156 34.8199428859611, 137.36946000878 34.820626485569, 137.369121824759 34.8209662379579, 137.368543462396 34.8215643019163, 137.367498102072 34.8209049414428, 137.366127192708 34.8200193125157, 137.367125486919 34.8189529200671, 137.367558540589 34.8191135015756, 137.368573812918 34.8194269502228)) ^^http://www.opengis.net/ont/geosparql#wktLiteral