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

[Ed McNierney]

Craig -

The EPSG codes for UTM Zone 12 NAD27 and UTM Zone 12 NAD83 are 26712 and
26912, respectively.  Those are the values you should be using in your
s_srs and t_srs parameters.

	- 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: Craig Aumann [mailto:caumann at ualberta.ca] 
Sent: Thursday, February 09, 2006 6:17 PM
To: Ed McNierney
Cc: gdal-dev at lists.maptools.org
Subject: RE: [Gdal-dev] Failed to load NAD27-83 correction file

Thanks!

I just need to go from UTM NAD27 to NAD 83.  Both are zone 12.  I
believe the NAD83 is GRS 80 as well. The area is NE Alberta. 

Cheers!
Craig




On Thu, 2006-02-09 at 17:05 -0500, Ed McNierney wrote:
> 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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--
CW-405 Biological Sciences Blding
University of Alberta
Edmonton AB
T6G 2E9
Phone: 780-492-1289
Fax:   780-492-9234