[Ubuntu] ECW CRS definition [SEC=UNCLASSIFIED]

[Lee]

Ah. Right. Thank you for clarifying. Good news is I have been able to create
a file which produces output I can load. Bad news it is has not fixed my
problem. Unfortunately it seems, when loaded, these files automatically
assign the CRS origin at their top left corner. Any of you run into this
before?

On Mon, Jul 4, 2011 at 7:11 PM, Pinner, Luke <Luke.Pinner at environment.gov.au
> wrote:

> No, your command does _not_ specify ecw output. It is generating geotiff
> output with a '.ecw' file extension. You need to use the "-of <format>"
> argument. gdal_translate does not use file extensions to determine
> output file type, so if you do not use "-of", gdal_translate will
> generate a file in the _default_ format, which is geotiff.
>
> Geotiff output:
> gdal_translate -a_srs EPSG:3078 in.ecw out.ecw
> ECW Output:
> gdal_translate -of ECW -a_srs EPSG:3078 in.ecw out.ecw
>
> Luke
>
> ________________________________
>
> From: ubuntu-bounces at lists.osgeo.org
> [mailto:ubuntu-bounces at lists.osgeo.org] On Behalf Of Lee
> Sent: Tuesday, 5 July 2011 5:32 AM
> To: Johan Van de Wauw
> Cc: ubuntu at lists.osgeo.org
> Subject: Re: [Ubuntu] ECW CRS definition
>
>
> Yes. The command which generates the error was one in which ecw was
> specified as both the input and the output. My initial email contains
> the commands utilized.
>
> gdal_translate in.ecw out.ecw -a_srs EPSG:3078
>
> Specifically, it seems that (a) gdal does not recognize there is a
> spatial system associated with this file and (b) won't let me assign one
> on my own.
>
>
> On Mon, Jul 4, 2011 at 7:33 AM, Johan Van de Wauw
> <johan.vandewauw at gmail.com> wrote:
>
>
>        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
>        >
>
>        > _______________________________________________
>        > UbuntuGIS mailing list
>        > Ubuntu at lists.osgeo.org
>        > http://lists.osgeo.org/mailman/listinfo/ubuntu
>        > http://trac.osgeo.org/ubuntugis/wiki
>        >
>        >
>
>
>
>
>
> --
>
> all the best,
> Lee
>
>
> If you have received this transmission in error please notify us
> immediately by return e-mail and delete all copies. If this e-mail or any
> attachments have been sent to you in error, that error does not constitute
> waiver of any confidentiality, privilege or copyright in respect of
> information in the e-mail or attachments.
>
> Please consider the environment before printing this email.
>



-- 
all the best,
Lee
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/ubuntu/attachments/20110704/e59929e5/attachment.html