メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.409802388684 43.7388971964073, 142.407696822588 43.7390290680106, 142.406724023067 43.7390809154383, 142.405804116261 43.739131364763, 142.405676104682 43.7381563240153, 142.406425041038 43.7378593509072, 142.407072305995 43.7375672383936, 142.407265397321 43.7374858259055, 142.407305070147 43.7375669223383, 142.409661661145 43.7374394950244, 142.409722862048 43.7379419247054, 142.409766920532 43.7384257429282, 142.409802388684 43.7388971964073)) ^^http://www.opengis.net/ont/geosparql#wktLiteral