メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.039868488999 42.9163562766459, 143.039825334328 42.9166632918541, 143.039092049925 42.9166061651043, 143.039280437263 42.9151615844295, 143.040028922411 42.9152150890033, 143.039868488999 42.9163562766459)) ^^http://www.opengis.net/ont/geosparql#wktLiteral