[Gdal-dev] Failed to load NAD27-83 correction file

[Ed McNierney]

Craig -

That error generally means that the required correction file can't be
found.  This is because either (a) the NAD grid shift files are not
installed properly, or (b) you are requesting a conversion for an area
outside the valid(installed) grid shift domains.

Those extents don't make sense as EPSG:4267 input values.  A part of the
conversion being attempted is to do a NAD datum shift with a longitude
of 373369 and a latitude of 6127595.  I believe the logic in PROJ will
permit those to be loaded (they may be clipped to "sane" values, I'm not
sure) and then PROJ will find that there is no valid grid shift file
available for that "location".

What is the correct input and desired output projection, and what is the
desired output extent in units of the output projection?

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: +1 (978) 251-4242
Fax: +1 (978) 251-1396
ed at topozone.com

-----Original Message-----
From: gdal-dev-bounces at lists.maptools.org
[mailto:gdal-dev-bounces at lists.maptools.org] On Behalf Of Craig Aumann
Sent: Thursday, February 09, 2006 4:37 PM
To: gdal-dev at lists.maptools.org
Subject: [Gdal-dev] Failed to load NAD27-83 correction file

Trying to re-project in gdalwarp.  What is required to get around this
error?  

gdalwarp -s_srs EPSG:4267 -t_srs EPSG:4269 -te 373369 6127595 374393
6128619  -tr 1 1 -ts 1024 1024 -rb $TEMPDIR/$FILE.temp.tif
$TEMPDIR/extract.tif ERROR 1: failed to load NAD27-83 correction file
ERROR 1: GDALSuggestedWarpOutput() failed because the passed transformer
failed.

I'm running Linux with:

> rpm -q gdal
gdal-1.3.0-2
> rpm -q proj
proj-4.4.9-1.fc4

Cheers!
Craig
--
CW-405 Biological Sciences Blding
University of Alberta
Edmonton AB
T6G 2E9
Phone: 780-492-1289
Fax:   780-492-9234


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