メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.742960055596 35.412863988874, 136.742861804731 35.413048428663, 136.741616007865 35.4126052284741, 136.741814447066 35.412236357776, 136.743056360882 35.4126811610556, 136.742960055596 35.412863988874)) ^^http://www.opengis.net/ont/geosparql#wktLiteral