[OSRS-PROJ] Datum Shifting
Gerald I. Evenden
gevenden at capecod.net
Wed Jul 5 13:21:17 EDT 2000
Jerry Evenden and the Low Riders, Katie and Daisy May
gevenden at capecod.net http://www.capecod.net/~gevenden
----- Original Message -----
From: <cjmce at lsu.edu>
To: <osrs-proj at remotesensing.org>
Sent: Wednesday, July 05, 2000 11:53 AM
Subject: Re: [OSRS-PROJ] Datum Shifting
> When Atef Elassal wrote GCTP, his objective was to translate John P.
> to FORTRAN 77. He did a superb job for the needs of the U.S. Geological
> Survey at the time.
I don't believe the first version was in 77. The one I got was in 360, G
compiler version uncompilable on non-big Blue machines. The 77 stuff
that came out later was not so hot either but that's a long story.
> Note that the NADCON algorithm is great for the U.S., but what about
> & Mexico? I believe "Geomatics Canada" has a hefty price tag on their
> transformation package for Maple Leaf applications. Have you seen the
> eye-popping prices charged by the Norwegians for their datum shift
> I think only the U.S. and Australia give their stuff out for free. South
> Africa's solution is privately marketed by Prof. Charles Merry at the
> University of Capetown.
The US is pretty unique in feeling that the taxpayers have already paid
for the job. Lots of countries also copyright their maps. US does not.
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