Hi Rudi,
Thanks a lot. It is working now eventhough the resulting clipped raster has a
poor quality compared to the origin.
Best regards,
Khaled
________________________________
From: Rudi von Staden <rud...@gmail.com>
To: Khaled Ibrahimi <ibrahimikha...@yahoo.com>
Cc: "qgis-user@lists.osgeo.org" <qgis-user@lists.osgeo.org>
Sent: Saturday, April 6, 2013 9:46 PM
Subject: Re: [Qgis-user] Raster Clipping
Hi Khaled,
On Sat, Apr 6, 2013 at 9:18 PM, Khaled Ibrahimi <ibrahimikha...@yahoo.com>
wrote:
I still have the same problem. I tried the "Raster->Projections->Warp" on my
Raster but I got the msg: ERROR 1: Unable to compute a transformation between
pixel/line and georeferenced coordinates for".
>
It sounds like your raster may not be georeferenced. Does it display in QGIS
when you load it as a raster? Does it align with the vector you are cutting it
with? From the command line, you can use gdalinfo to see if there's a
coordinate system defined. If you run 'gdalinfo <filename>.jpg' (from the same
directory as the file), the resulting output should include something like this
if it's georeferenced:
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
if it isn't, you'll see something like this:
Coordinate System is `'
If it's not georeferenced, you can georeference it using the Georeferencer
plugin (there's a useful tutorial here:
http://glaikit.org/2011/03/27/image-georeferencing-with-qgis/).
Hope this helps,
Rudi
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