Hi Yves
On Mon, Apr 9, 2012 at 7:51 PM, Yves Jacolin (free) yjaco...@free.fr wrote:
Hello,
Hakcfest will begin in a few days. I would like to be sure that you have all
information you need. You can contact me in private to get my professional
phone number in case you need to contact someone
I avoid using the Google Mercator CRS (EPSG:900913, in QGIS Master) in QGIS
projects because I know that it has problems. For example, users get into
trouble trying to measuring distances using the tape measure. But people do
use Google Mercator for projects and a recent post here suggest that
Hello Mailing List
I am running qgis on Windows. I recently upgraded to 1.7.4. which is great, but
ever since I seem to have lost the GRASS plugin. I can't find it on either
'Fetch python plugins' or 'Manage python plugins' and my GRASS toolbar has
entirely disappeared. I have tried
I've got a DEM, basically a cut-out of SRTM data. Trying to calculate its
slope gives me extremely weird output, such that all values are 89 degrees.
Dataset: http://linfiniti.com/~rudi/SRTM.zip
Can anyone confirm? I'm suspecting a local issue though, not the data ...
I have observed a similar problem with Google mercator and vector files. I have
a google satellite map, and several point vector files all in google mercator
transformation, but the relationship between the locations on the map and the
locations of the points of the vector files are not stable.
You're SRTM has geographical CRS (WGS84). You must keep into account when
doing morphological analysis. If you reproject it to a planar projections
(e.g. UTM) the results are correct.
giovanni
2012/4/10 Rudi Thiede r...@linfiniti.com
I've got a DEM, basically a cut-out of SRTM data. Trying to
Hello!
There are some possible pitfalls with the so-called Google Mercator
projection - look for example at
http://www.hydrometronics.com/downloads/Web%20Mercator%20-%20Non-Conformal,%20Non-Mercator%20%28notes%29.pdf
Specially at pages 5, 9 and 13 in the pdf linked above...might be the
Hi Rudi!
I had the same issue using ASTER Data some days ago.
It should also work in the WGS84 projection by using the GDAL based DEM
utilities.
Just use the slope analysis and put a hook on the checkbox with use percent
slope (instead of degrees)
And be sure to save the output in the same
Hi everyone!
Does anybody have an idea how to get a calculated slope tif from qgis into
Photoshop?
As the data is a GDT_Float32 - Thirty two bit floating point, opened in
Photoshop it
becomes a black/white mask-like image.
Or maybe any way to convert it to a normal tif?
I just want to avoid
Not sure about your question, but why do you want to avoid exporting it
as png? The png uses losless compression, so the quality should be the
same as tiff. And if you need tiff as output, just convert it to tiff in
Photoshop. Or is there another reason?
On 04/10/2012 01:15 PM, mnertinger
Am 10.04.12 12:33, schrieb Hannah Pethen:
I have observed a similar problem with Google mercator and vector
files. I have a google satellite map, and several point vector files
all in google mercator transformation, but the relationship between
the locations on the map and the locations of the
Using an png wouldn't be a problem at all.
But i have to use the print-composer to get the png,
because by just exporting the slope as png I get the same
mask-like result in PS, as with the tif.
And using the print composer to export an image is rather imprecise
and unpleasing…
I just don‘t get
Depending how often you'll need this it could be interesting to write a small
python script that reads the image (eg. via gdal python bindings), transform
the data if necessary, and apply a colormap to it, exporting it into the
color-representation you need (eg. using matplotlib's colormaps).
Using the print composer is a bit cumbersome, but does not need to be
imprecise. See this short explanation how you can use it to export
georeferenced images:
http://pvanb.wordpress.com/2011/09/28/create-wld-file-for-map-image/.
The other way to do this is
Hi Rudi
From Version 1.8 on, you can set the parameter 'z-scale' if your x-/y-
units are different than the z-unit.
If e.g. x-/y- is degrees and z meters, you may set z-Factor 20.
Regards,
Marco
On 10.04.2012 12:20, Rudi Thiede wrote:
I've got a DEM, basically a cut-out of SRTM data.
Hi,
I need help with installing QGIS.
I downloaded QGIS (QGIS-OSGeo4W-1.7.4d211b16-Setup.exe) and installed it.
But when I tried to Start the program by clicking the Desktop Shortcut, I
get the following Error Message:
The procedure entry point TIFFMergeFieldInfo could not be located in
On Tue, Apr 10, 2012 at 9:18 AM, Paulo van Breugel
p.vanbreu...@gmail.com wrote:
Using the print composer is a bit cumbersome, but does not need to be
imprecise. See this short explanation how you can use it to export
georeferenced images:
Same problem here. GRASS missing in 1.7.4 and 1.9.90. Also cannot run GRASS
6.4.2 GUI from OSGeo4w install. I *think* the only thing I have changed
since last running GRASS is that I installed the SEXTANTE plugin.
When trying to start the GUI, g.dirseps.exe says that libintl3.dll was not
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