メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.412509286241 43.7879024116868, 142.413031687477 43.7882104428457, 142.413388501036 43.7884549939795, 142.413716865702 43.7886510100513, 142.414085624698 43.7888998499581, 142.412770053645 43.7899913289818, 142.412385023064 43.7897522479617, 142.412049538412 43.7895439154426, 142.411703723659 43.7893291964601, 142.411190390374 43.7890104217609, 142.410986821974 43.7888840022138, 142.410679410087 43.7886931022637, 142.411650053527 43.7878809014869, 142.411998794903 43.7875857462811, 142.412509286241 43.7879024116868)) ^^http://www.opengis.net/ont/geosparql#wktLiteral