メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.257718802673 36.6145756659444, 137.257767145599 36.6147358073927, 137.258159020514 36.6146477747582, 137.258251957126 36.6149077212166, 137.256562652315 36.6152983807719, 137.255640438986 36.6155191764389, 137.255345415166 36.6146614719615, 137.254976959604 36.6136685692169, 137.256361619059 36.613330195413, 137.256583324144 36.6132675749311, 137.256988464097 36.6144260473389, 137.257634819023 36.6142973361473, 137.257718802673 36.6145756659444)) ^^http://www.opengis.net/ont/geosparql#wktLiteral