ahmet,
One likely reason for the dark image is that your viewer is assuming a range
of 0-65535 for the alpha values.
Check the histogram of the output image. In the histogram for the second
band, there should be a bunch of 0 valued pixels and 255 valued pixels.
Please provide a small sample image
hello
I want to make nodata areas transparent.
here is what I did:
1.
$gdalinfo -mm -noct duy_cat1.tif | grep -i 'nodata'
NoData Value=65535
2.
gdalwarp -srcnodata 65535 -dstalpha duy_cat1.tif duy_cat14.tif
But, duy_cat14.tif looks full black
here is info of outputfile(duy_cat14.tif):
Did you run "sudo ldconfig"?
http://trac.osgeo.org/ubuntugis/wiki/UserTutorials
-marius
On Sat, 2011-02-05 at 20:24 +0100, Even Rouault wrote:
> Le samedi 05 février 2011 20:18:16, Matt Wilkie a écrit :
> > > So you should try "sudo gdal-ecw-build /usr/local" because you
> > > "./configure" the
Le samedi 05 février 2011 20:18:16, Matt Wilkie a écrit :
> > So you should try "sudo gdal-ecw-build /usr/local" because you
> > "./configure" the ECW SDK without any installation prefix.
>
> Ahh, thanks Even. That let me run gdal-ecw-build without error, though
> there were lots of deprecation wa
> So you should try "sudo gdal-ecw-build /usr/local" because you "./configure"
> the ECW SDK without any installation prefix.
Ahh, thanks Even. That let me run gdal-ecw-build without error, though
there were lots of deprecation warnings.
"gdalinfo --formats |grep -i ecw" still comes back empty h
Even,
Hermann might be right. From reading several sources:
http://gge.unb.ca/Pubs/TR46.pdf
http://www.manifold.net/doc/double_stereographic.htm
it seems that double stereographic is oblique stereographic as long as
the origin is non-equatorial or non-polar.
The actual denomination "Double Stereog
On 05/02/2011 13:12, Even Rouault wrote:
I've just had a look, but not being neither Dutch nor a specialist of
(stereographic) projections, I don't feel competent enough to do any action on
it. Those tickets plus the reading of
http://udig.refractions.net/files/docs/api-
geotools/org/geotools/re
Le samedi 05 février 2011 12:49:15, Hermann Peifer a écrit :
> On 05/02/2011 00:06, Even Rouault wrote:
> > Unrelated with GDAL 1.8.0. The issue was that the transformation between
> > OGC WKT and ESRI WKT didn't handle well the Oblique Stereographic
> > projection. Fixed in trunk in http://trac.os
On 05/02/2011 00:06, Even Rouault wrote:
Unrelated with GDAL 1.8.0. The issue was that the transformation between OGC
WKT and ESRI WKT didn't handle well the Oblique Stereographic projection.
Fixed in trunk in http://trac.osgeo.org/gdal/changeset/21627
Even,
Once upon a time I opened http://
The error message
"""using /usr/lib/gdal17plugins as GDAL shared library autoload directory
checking for libNCSEcw.so or libecwj2... configure: error: not found
in /home/matt/src/libecwj2-3.3/Source//lib or
/home/matt/src/libecwj2-3.3/Source//bin."""
leads me to think that you didn't specify the
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