{"action":"created","issue":{"url":"https://api.github.com/repos/OSGeo/proj.4/issues/403","repository_url":"https://api.github.com/repos/OSGeo/proj.4","labels_url":"https://api.github.com/repos/OSGeo/proj.4/issues/403/labels{/name}","comments_url":"https://api.github.com/repos/OSGeo/proj.4/issues/403/comments","events_url":"https://api.github.com/repos/OSGeo/proj.4/issues/403/events","html_url":"https://github.com/OSGeo/proj.4/pull/403","id":172295674,"number":403,"title":"The definition of EPSG:28992 is wrong. For some reason there has been…","user":{"login":"julien2512","id":838473,"avatar_url":"https://avatars.githubusercontent.com/u/838473?v=3","gravatar_id":"","url":"https://api.github.com/users/julien2512","html_url":"https://github.com/julien2512","followers_url":"https://api.github.com/users/julien2512/followers","following_url":"https://api.github.com/users/julien2512/following{/other_user}","gists_url":"https://api.github.com/users/julien2512/gists{/gist_id}","starred_url":"https://api.github.com/users/julien2512/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/julien2512/subscriptions","organizations_url":"https://api.github.com/users/julien2512/orgs","repos_url":"https://api.github.com/users/julien2512/repos","events_url":"https://api.github.com/users/julien2512/events{/privacy}","received_events_url":"https://api.github.com/users/julien2512/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":9,"created_at":"2016-08-20T23:16:13Z","updated_at":"2016-08-22T12:40:12Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/OSGeo/proj.4/pulls/403","html_url":"https://github.com/OSGeo/proj.4/pull/403","diff_url":"https://github.com/OSGeo/proj.4/pull/403.diff","patch_url":"https://github.com/OSGeo/proj.4/pull/403.patch"},"body":"reported by @bbrala on proj4php\r\n\r\nSee \r\nhttps://oegeo.wordpress.com/2008/05/20/note-to-self-the-one-and-only-rd-projection-string/\r\n\r\nI am going to tell https://epsg.io/28992 too."},"comment":{"url":"https://api.github.com/repos/OSGeo/proj.4/issues/comments/241400258","html_url":"https://github.com/OSGeo/proj.4/pull/403#issuecomment-241400258","issue_url":"https://api.github.com/repos/OSGeo/proj.4/issues/403","id":241400258,"user":{"login":"fsteggink","id":1371655,"avatar_url":"https://avatars.githubusercontent.com/u/1371655?v=3","gravatar_id":"","url":"https://api.github.com/users/fsteggink","html_url":"https://github.com/fsteggink","followers_url":"https://api.github.com/users/fsteggink/followers","following_url":"https://api.github.com/users/fsteggink/following{/other_user}","gists_url":"https://api.github.com/users/fsteggink/gists{/gist_id}","starred_url":"https://api.github.com/users/fsteggink/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fsteggink/subscriptions","organizations_url":"https://api.github.com/users/fsteggink/orgs","repos_url":"https://api.github.com/users/fsteggink/repos","events_url":"https://api.github.com/users/fsteggink/events{/privacy}","received_events_url":"https://api.github.com/users/fsteggink/received_events","type":"User","site_admin":false},"created_at":"2016-08-22T12:40:12Z","updated_at":"2016-08-22T12:40:12Z","body":"This issue was discussed at the [osgeo.nl mailing list](https://lists.osgeo.org/pipermail/dutch/2016-August/001465.html).\r\n\r\nI have some question as for the origin of the parameters. Martijn's blog post is from 2008. The EPSG parameters for RD have been updated since. Also the scale factor has a rounding error. The correct value is 0.9999079. See http://www.epsg-registry.org/, and look up code 28992. Unfortunately no permalink. When copying, all formatting is lost.\r\n\r\nToday I've downloaded a fresh copy from [RDNAPTRANS](https://www.kadaster.nl/web/formulier/Rijksdriehoeksmeting-formulieren/Aanvraag-download-RDNAPTRANS2008.htm), to have a look at the \"towgs84\" parameters. The link is in Dutch only, and you have to fill in contact details.\r\n\r\nHere are the transformation parameters from RD to **ETRS89**:\r\n```\r\nTransformation parameters from RD(Bessel) to ETRS89\r\nPivot point: center of the ellipsoid\r\nalfa\t1,9342 \t*10^-6 rad\r\nbeta\t-1,6677 \t*10^-6 rad\r\ngamma\t9,1019 \t*10^-6 rad\r\ndelta\t4,0725 \t*10^-6\r\ntx\t565,4171 \tm\r\nty\t50,3319 \tm\r\ntz\t465,5524 \tm\r\n```\r\n\r\nNote that alfa/beta/gamma are in millionths of radians, not arc seconds.\r\nAlso note that the transformation parameters are to ETRS89, and not WGS84, since the Netherlands is part of the EU. I'm pretty sure they are identical, especially not because continental drift is still going on. WGS84 is not mentioned anywhere in the downloaded ZIP file at all.\r\n\r\n"}}
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