メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.325576273586 43.7705521743252, 142.326273096061 43.771240685941, 142.326568199651 43.7715339934142, 142.325401420526 43.7721465863835, 142.325074577953 43.7723286887911, 142.323667800279 43.7730328933012, 142.323327514485 43.7727115329382, 142.323137153323 43.7725325106479, 142.322697333807 43.7720739445961, 142.32222329605 43.77161814032, 142.323597227909 43.770891084591, 142.323609057272 43.7709028387643, 142.325125050006 43.7700936241002, 142.325576273586 43.7705521743252)) ^^http://www.opengis.net/ont/geosparql#wktLiteral