メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.038569954341 42.9151088679279, 143.038621816787 42.9151126615715, 143.039044668372 42.9151432315551, 143.039219668022 42.9151572194844, 143.039280437263 42.9151615844295, 143.039092049925 42.9166061651043, 143.038437645749 42.9165551722989, 143.038375863133 42.9165503925606, 143.037669019764 42.9164953246906, 143.037866868326 42.9150584881762, 143.038569954341 42.9151088679279)) ^^http://www.opengis.net/ont/geosparql#wktLiteral