メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.560524786718 40.5916668579593, 140.559720484287 40.5915398190659, 140.558414558958 40.5913597201011, 140.558546960027 40.5907734691106, 140.558625645352 40.5902883054859, 140.558672925092 40.5898033839146, 140.560040123361 40.5898378351059, 140.560881297502 40.5898694808966, 140.560681166869 40.5909277676445, 140.560524786718 40.5916668579593)) ^^http://www.opengis.net/ont/geosparql#wktLiteral