メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.302902566196 43.0647012047056, 141.302513796998 43.0649134038027, 141.301772510186 43.0653189689294, 141.301745981055 43.0652976499854, 141.301436437759 43.0650493552127, 141.301314686759 43.0649516436098, 141.300812058318 43.0645542676141, 141.301086238048 43.0644084985141, 141.301705966577 43.0640790820166, 141.30176605863 43.0640511666682, 141.302709404727 43.0635351000585, 141.30310918757 43.0633172245956, 141.303349337791 43.063530901236, 141.303755322186 43.0638886464307, 141.303998793662 43.0640987627355, 141.303333743659 43.0644694523758, 141.302902566196 43.0647012047056)) ^^http://www.opengis.net/ont/geosparql#wktLiteral