メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.873838074045 43.3359660921933, 141.873958503062 43.336381421077, 141.873975161959 43.336434080387, 141.874111969649 43.336900591364, 141.874190119475 43.3371687960279, 141.870538379943 43.3377583483173, 141.870452894333 43.3374941272726, 141.870377965424 43.3372603927424, 141.870295966509 43.3370091936335, 141.87014500784 43.3365251240572, 141.870050195191 43.3362352724635, 141.871984691313 43.3359282820714, 141.873738603502 43.3356522449912, 141.873838074045 43.3359660921933)) ^^http://www.opengis.net/ont/geosparql#wktLiteral