メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.083359461715 43.5414550305258, 142.082082368205 43.5412716100457, 142.082251970822 43.5394251849921, 142.082500886348 43.5394409590078, 142.082592711991 43.538887363233, 142.082763404427 43.5388979569714, 142.083564712095 43.5389578032943, 142.083858701046 43.5389720592689, 142.084053063605 43.538996469879, 142.084124199395 43.539000056545, 142.083902898129 43.5400326515911, 142.083674770496 43.540159458092, 142.083589302622 43.5404098267675, 142.083359461715 43.5414550305258)) ^^http://www.opengis.net/ont/geosparql#wktLiteral