メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.900060769726 37.0568435421134, 140.898760434614 37.0566855672425, 140.897679701043 37.0565534172485, 140.897726685616 37.0559938302675, 140.898484860002 37.0560429238645, 140.8988401244 37.0561475816288, 140.900124739199 37.0562498743106, 140.900060769726 37.0568435421134)) ^^http://www.opengis.net/ont/geosparql#wktLiteral