メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.227889414303 36.6891432237434, 137.228982657055 36.6892860733472, 137.228784267233 36.6897296617749, 137.228631390036 36.690119927916, 137.228639196243 36.6904564626801, 137.228489448335 36.6904502733559, 137.228357434757 36.6904444982514, 137.22779601285 36.6904197228178, 137.227406997758 36.6904026020848, 137.227258959608 36.6903960588899, 137.226712497795 36.6903719737239, 137.226769975528 36.689892412863, 137.226817365484 36.6895939420366, 137.226869876506 36.6889922290373, 137.227889414303 36.6891432237434)) ^^http://www.opengis.net/ont/geosparql#wktLiteral