メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.474014848977 43.4613390979945, 142.474502064133 43.4610966774559, 142.475465765712 43.4606568966224, 142.47614607998 43.4614143799455, 142.476679025498 43.4620280519946, 142.474501448945 43.4630450451087, 142.47379769528 43.4633630682019, 142.473658089904 43.4632078839647, 142.473365007797 43.4628533062059, 142.473036520338 43.4624531187254, 142.4726353579 43.4619860863623, 142.472903925187 43.4618603118824, 142.473247836819 43.4616992972521, 142.473978252821 43.461357314529, 142.474014848977 43.4613390979945)) ^^http://www.opengis.net/ont/geosparql#wktLiteral