[Ubuntu] ECW CRS definition

[Johan Van de Wauw]

Have you tried specifying the output format? gdal_translate will
create geotiff by default. Perhaps that is causing the problem: qgis
thinks it is reading a ecw file, where in reality it's a geotiff

So
gdal_translate in.ecw out.tif -a_srs EPSG:3078
or
gdal_translate in.ecw out.ecw -a_srs EPSG:3078 -of ECW



On Sat, Jul 2, 2011 at 7:52 PM, Lee <muellerl at gmail.com> wrote:
> I've tried the QGIS-user listserv to no avail. Figured I'd try here, perhaps
> at least I can get forwarded to the right one.
>
> I have an ECW that does not seem to want to accept a CRS definition.
> Initially I was attempting to warp the ECW file from Michigan Georef to
> NAD83 UTM zone 17. I got an error.
>
> ERROR 1: Unable to compute a transformation between pixel/line
> and georeferenced coordinates for /home/lee/documents/gis/
> detroit/aerial/WYANDOTTE_NE/WYANDOTTE_NE.ecw.
> There is no affine transformation and no GCPs
>
> QGIS shows a generated CRS that seems right for Michigan Georef, it just
> does not seem to recognize that a CRS is there, so I cannot warp to the new
> projection. Next, I tried manually assigning the CRS in question so I would
> then be able to convert.
>
> gdal_translate in.ecw out.ecw -a_srs EPSG:3078
>
> This creates a file, but one which is un-readable in qgis.
>
> I am not exactly sure which is the problem that needs fixing here.
> Essentially, I just need to find a way to get this ECW file (in Michigan
> Georef) as any format (in NAD83 UTM zone 17). So whatever suggestions you
> have for accomplishing this, I am willing to try.
>
> Thanks for any help in advance.
>
> --
> all the best,
> Lee
>
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