[Gdal-dev] problem with warping lat-long to UTM

[Norman Barker]

Thanks Frank,

works a treat!

Norman

Frank Warmerdam wrote:

> Norman Barker wrote:
>
>> Hi,
>>
>> I am using gdalwarp to warp an image in Lat Long to UTM.
>>
>> I am using latlong.tif from ftp.remotesensing.org/samples/pci_eg
>>
>> and executing the command
>> gdalwarp -t_srs EPSG:32711 latlong.tif out.tif
>>
>> but I get the error
>> ERROR 1: failed to load NAD27-83 correction file
>> ERROR 1: GDALSuggestedWarpOutput() failed because the passed
>> transformer failed.
>>
>> I have seen this discussed before, but there doesn't seem to be an 
>> answer I
>> can use.
>
>
> Norman,
>
> The problem is that you need PROJ.4 datum shift files to convert the
> latlong.tif NAD27 file to other datums.  To build and install PROJ.4 on
> linux with the datum shift files, download and unpack the following 
> tar file
> in your proj/nad directory before doing the configure, build and install.
>
>   ftp://ftp.remotesensing.org/pub/proj/proj-nad27-1.2.tar.gz
>
> If you just want to experiment with warping you could also likely just 
> override
> the latlong.tif file to treat it as WGS84 instead of NAD27 using a 
> command
> like:
>
>  gdalwarp -s_srs WGS84 -t_srs EPSG:32711 latlong.tif out.tif
>
> Best regards,


-- 
Norman Barker
Software Engineer
ComSine Ltd
Tel: +44 (0)1483 457121
Web: http://www.comsine.com
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