{"action":"created","issue":{"url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/issues/19","repository_url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl","labels_url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/issues/19/labels{/name}","comments_url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/issues/19/comments","events_url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/issues/19/events","html_url":"https://github.com/JuliaGeo/Geodesy.jl/pull/19","id":165814604,"number":19,"title":"WIP: Implement ITRF to GDA94 datum transformation","user":{"login":"c42f","id":601473,"avatar_url":"https://avatars.githubusercontent.com/u/601473?v=3","gravatar_id":"","url":"https://api.github.com/users/c42f","html_url":"https://github.com/c42f","followers_url":"https://api.github.com/users/c42f/followers","following_url":"https://api.github.com/users/c42f/following{/other_user}","gists_url":"https://api.github.com/users/c42f/gists{/gist_id}","starred_url":"https://api.github.com/users/c42f/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/c42f/subscriptions","organizations_url":"https://api.github.com/users/c42f/orgs","repos_url":"https://api.github.com/users/c42f/repos","events_url":"https://api.github.com/users/c42f/events{/privacy}","received_events_url":"https://api.github.com/users/c42f/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":6,"created_at":"2016-07-15T15:30:21Z","updated_at":"2016-07-21T04:16:59Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/pulls/19","html_url":"https://github.com/JuliaGeo/Geodesy.jl/pull/19","diff_url":"https://github.com/JuliaGeo/Geodesy.jl/pull/19.diff","patch_url":"https://github.com/JuliaGeo/Geodesy.jl/pull/19.patch"},"body":"Still a work in progress:\r\n\r\n* The tests suggest something's still wrong here, needs further testing.  Unfortunately I don't know of an easy source of good test data for this Australia wide.  Perhaps we can get some current station coordinates from ftp://ftp.ga.gov.au/geodesy-outgoing/gnss/solutions/final/weekly/ and compare to nominal GDA94 station coordinates.  May require some data munging.\r\n* Depends on CoordinateTransformations affine transformation branch\r\n\r\n@andyferris"},"comment":{"url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/issues/comments/234152615","html_url":"https://github.com/JuliaGeo/Geodesy.jl/pull/19#issuecomment-234152615","issue_url":"https://api.github.com/repos/JuliaGeo/Geodesy.jl/issues/19","id":234152615,"user":{"login":"c42f","id":601473,"avatar_url":"https://avatars.githubusercontent.com/u/601473?v=3","gravatar_id":"","url":"https://api.github.com/users/c42f","html_url":"https://github.com/c42f","followers_url":"https://api.github.com/users/c42f/followers","following_url":"https://api.github.com/users/c42f/following{/other_user}","gists_url":"https://api.github.com/users/c42f/gists{/gist_id}","starred_url":"https://api.github.com/users/c42f/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/c42f/subscriptions","organizations_url":"https://api.github.com/users/c42f/orgs","repos_url":"https://api.github.com/users/c42f/repos","events_url":"https://api.github.com/users/c42f/events{/privacy}","received_events_url":"https://api.github.com/users/c42f/received_events","type":"User","site_admin":false},"created_at":"2016-07-21T04:16:59Z","updated_at":"2016-07-21T04:16:59Z","body":"> So geodetic_datum_transform() could return any kind of transformation object?\r\n\r\nRight exactly.  And because the input Datums are types, the output will be type-inferrable.  Here's another cool side effect: Suppose you wanted input and output in LLA instead.  Easy!\r\n\r\n```julia\r\nfunction make_datum_transform_LLA(dest_datum, source_datum)\r\n    LLAfromECEF(ellipsoid(dest_datum)) ∘ make_datum_transform_ECEF(dest_datum, source_datum) ∘ ECEFfromLLA(ellipsoid(source_datum))\r\nend\r\n```\r\n\r\n"}}
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