[gdal-dev] Re: Handling nodata values

2010-06-26 Thread NopMap
Even Rouault wrote: > > Yo say 'gdalmerge quits with an error', but you didn't mention the exact > error > message nor the command line you've used, so it is hard to tell what's > wrong > Oh, that cause was obvious. Since the TIF had lost the georefence, there was no overlap between the reque

[gdal-dev] Re: Handling nodata values

2010-06-26 Thread NopMap
Chaitanya kumar CH wrote: > > Since you said that gdalwarp did not work, try gdal_merge.py with the > options "-n -332768 -init 0". > Thank you, this did the job! Nop -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Handling-nodata-values-tp5222453p5224997.html Sent

[gdal-dev] Re: Handling nodata values

2010-06-26 Thread NopMap
Chaitanya kumar CH wrote: > > > In line 93 in val_repl.py, the default value is taken as of type Byte. For > a > quick fix, mention the data type of the raster reported by gdalinfo with > the > option -ot to the script. Refer to ( > http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/python/samp

[gdal-dev] Re: Handling nodata values

2010-06-25 Thread NopMap
Thank you for your reply. I played around a little bit but without success. When I apply val_repl.py to the data, it appears to cut off all the higher elevations while the lower areas remain untouched. So the resulting TIF is unusable. What could cause this problem? gdal_contour seems to recogn

[gdal-dev] Handling nodata values

2010-06-25 Thread NopMap
Hi! I am trying to create contour lines (and later hillshading) from CGIAR data. They use –32768 as a nodata value for sea areas which results in tremendous cliffs if the data is processed by gdal_contour as it is. I am looking for a way to replace this nodata value in the geotiffs by a simple

[gdal-dev] Re: Gdal / Python / Win7 crash with ReadAsArray()

2010-03-24 Thread NopMap
Tamas Szekeres wrote: > > If you could do a test with the binaries provided at > http://vbkto.dyndns.org/sdk/ that would be helpful. It seems the python > auto-tests are working well with these packages on a Win2003 Server x64 > platform. > I have downloaded a release from there. It looks a b

[gdal-dev] Re: Gdal / Python / Win7 crash with ReadAsArray()

2010-03-23 Thread NopMap
I am running the 32bit Versions of python and gdal. bye Nop -- View this message in context: http://n2.nabble.com/Gdal-Python-Win7-crash-with-ReadAsArray-tp4398401p4788484.html Sent from the GDAL - Dev mailing list archive at Nabble.com. _

[gdal-dev] Re: Gdal / Python / Win7 crash with ReadAsArray()

2010-03-23 Thread NopMap
Hi! Eventually I had some time to look into this again. First thing I tried is updating python to 2.6.5 - no change, still crashes. Then I tried running exactly the same files in a 32bit XP virtual machine. It works there. This is a workaround, but not a solution as I cannot run the whole work

[gdal-dev] Re: Gdal / Python / Win7 crash with ReadAsArray()

2010-03-10 Thread NopMap
Hi! I am still struggling with this problem. No ideas anybody? Or maybe a recommendation for a better forum to adress this matter? bye Nop -- View this message in context: http://n2.nabble.com/Gdal-Python-Win7-crash-with-ReadAsArray-tp4398401p4712621.html Sent from the GDAL - Dev

[gdal-dev] Re: Gdal / Python / Win7 crash with ReadAsArray()

2010-02-24 Thread NopMap
Hi! A small update. I tried this again, with the 1.6.0 bindings and the 1.6.1 bindings and in the XP compatibility mode. Always the same crash. Does any of you have an idea what might be the reason? - Python 2.5 vs. 2.6 Problems? - Windows 7 problem? - 64 bit machine problem? - missing dependen

[gdal-dev] Re: Gdal / Python / Win7 crash with ReadAsArray()

2010-02-23 Thread NopMap
Hi! Any progress on this? I am having exactly the same problem. I am using GDAL 1.6, Python binding 1.6 for python 2.6 on a Windows 7 64bit machine. When I try to use gdal_merge.py, python crashes with the same error message in ntdll.dll. Any ideas on how to fix this? bye Nop -- View

Re: [Gdal-dev] Problem with gdal_translate

2010-01-11 Thread NopMap
Hi! Frank Warmerdam wrote: > > NopMap wrote: >> Is this also true for -projwin? From the documentation I got the >> impression >> that -srcwin requires meters while -projwin accepted the coordinates in >> lat/lon?? > > -srcwin takes the locations in pix

Re: [Gdal-dev] Problem with gdal_translate

2010-01-11 Thread NopMap
Hi! Frank Warmerdam wrote: > > You need to specify the corners in the coordinate system of the > image. So the values should be the meter based projected coordinates > like 1102062,6818226. > Is this also true for -projwin? From the documentation I got the impression that -srcwin requires m

[Gdal-dev] Problem with gdal_translate

2010-01-11 Thread NopMap
Hi! I am trying to make a GeoTiff a little bit smaller with gdal_translate. Gdalinfo shows that the TIF has the following size: Upper Left ( 1102062.959, 6818226.972) ( 9d54'0.00"E, 52d 6'0.00"N) Lower Right ( 1692080.162, 6257943.762) ( 15d12'0.77"E, 48d54'0.71"N) I call gdal_translate -pro

[Gdal-dev] Which tool to add an offset?

2009-12-22 Thread NopMap
Hi! I am building a map with several layers containing OSM geometry and hillshading+contours. The rendering chain for the hillshading is SRTM GeoTiff -> gdal_merge -> gdal_warp -> hillshading.exe -> mapnik Now I have the problem that the hillshading and the geometry do not quite match. It seem

Re: [Gdal-dev] gdal_contour crashing

2009-11-11 Thread NopMap
Hi! Frank Warmerdam wrote: > > Also, high contour density > can occur if there are crazy no-data values in the raster (ie. -1e7 in a > floating point raster) which can trigger a huge "pile" of contours around > the bad data value. > I think you are right. After another subdivision, both halv

[Gdal-dev] gdal_contour crashing

2009-11-11 Thread NopMap
Hi! I have sudden problem with gdal_contour after using ist successfully many times. There seems to be a problem with a certain area. When I tried it first, gdal_contour quit with an out-of-memory message, exceeding 2GB of virtual memory. When I reduced the area and called gdal_merge.py -o M:\s