メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.182795975354 35.3641096148895, 137.18231727085 35.3638103051084, 137.181618290564 35.3633904558952, 137.180813801512 35.3628611766359, 137.181078256714 35.3625687530796, 137.181610846282 35.3628655256553, 137.183099112299 35.3637437306253, 137.182795975354 35.3641096148895)) ^^http://www.opengis.net/ont/geosparql#wktLiteral