The proj4-hs-bindings package

[Tags: gpl, library]

Haskell bindings for the Proj.4 map projection C library.

You need to have Proj.4 already installed as a shared library.

Example transformations (from http://www.mysqludf.org/lib_mysqludf_fPROJ4/):

 import Geo.Proj4

 lon0 = 22.350 * pi / 180 -- Test longitude in radians.
 lat0 = 40.084 * pi / 180 -- Test latitude in radians.
 alt0 = 2843 -- Test altitude in meters.

 -- | Test projection:
 pj = newProjection "+proj=utm +zone=34"

 -- | Another test (null, e.g. cylindrical) projction:
 pj0 = newProjection "+proj=latlong +ellps=clrk66"

 -- | A projection of our test longitude & latitude, using @pj:
 (x, y) = pjFwd pj (lon0, lat0)

 -- | An inverse projection from (x, y) to (longitude, latitude):
 (lon, lat) = pjInv pj (x, y)

 -- | Convert our test position from one projection to another (pj0 -> pj):
 (x2, y2, z2) = pjTransformPt pj0 pj (lon0, lat0, alt0)

 main :: IO ()
 main = do
     putStrLn $ "(x, y): " ++ (show (x, y))
     putStrLn $ "(lon, lat): " ++ (show (lon * 180 / pi, lat * 180 / pi))
     putStrLn $ "(x, y, z): " ++ (show $ (x2, y2, z2))
     return ()

You should see the following when you compile and run the above:

 (x, y): (615096.1096381239,4437953.6592040695)
 (lon, lat): (22.350000000000662,40.083999999999584)
 (x, y, z): (615096.1096381239,4437953.6592040695,2843.0)

Properties

Version0.1
Dependenciesbase (<5), ghc-prim
LicenseGPL
Copyright(C) 2012–2013 Pavel M. Penev, LaRouche Policy Institute
AuthorPavel M. Penev <pavpen@gmail.com>
MaintainerPavel M. Penev <pavpen@gmail.com>
Stabilityexperimental
CategoryData
UploadedSun Sep 22 06:09:10 UTC 2013 by PavelPenev
Downloads141 total (8 in last 30 days)
StatusDocs not available [build log]
All reported builds failed [all 2 reports]

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