[OSRS-PROJ] NTv2 (.gsb) grid shifting support

Paul Selormey paul at toolscenter.org
Sat Mar 15 01:44:29 EST 2003


Hello Frank,
Since Proj4 is a working code being used in many applications,
I think it will be better to commit only working codes.

Not everyone will read this, and some may even join the list
later. In fact, you do not have to join the list to use the Proj4 :((

Best regards,
Paul.

----- Original Message -----
From: "Frank Warmerdam" <warmerdam at pobox.com>
To: "PROJ.4 Discussion" <osrs-proj at remotesensing.org>
Sent: Saturday, March 15, 2003 3:06 PM
Subject: [OSRS-PROJ] NTv2 (.gsb) grid shifting support


>
> Folks,
>
> I have preliminary support for Canadian NTv2 grid shift files incorporated
> into PROJ.4 with some major flaws still (it does not pick the most refined
> grid).  This is the same .gsb format used by some other organizations,
> notably in Australia.
>
> I write this to warn people that the structural changes in PROJ.4 (in the
> datum shifting area) were substantial and are not really quite complete
> so take care using PROJ.4 from CVS for a week or so.
>
> Best regards,
>
> --
> ---------------------------------------+----------------------------------
----
> I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for Rent
>
>
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