メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.349518739439 43.7901226551136, 142.350568353036 43.7908866599146, 142.35053392347 43.7909053787486, 142.349971634566 43.7913230603221, 142.349984510315 43.791332367973, 142.349666755683 43.7915561295123, 142.349396529162 43.791758754129, 142.348492703479 43.7911481245919, 142.348049608755 43.7908406742451, 142.348014092388 43.7906979681046, 142.347760925711 43.7905362706265, 142.348334070789 43.7901298055239, 142.348959003962 43.7896809780872, 142.348970736648 43.7896723698842, 142.349560687674 43.7900927666573, 142.349518739439 43.7901226551136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral