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Jun
18
comment QGIS interface very slow on OSX
Its the KyngChaos version. I opened the same project in a VirtualMachine Lubuntu installation and it was fine, but I took the opportunity to remove some large rasters from the project, rasters that weren't visible but still listed. Upon returning to the OSX version everything was back to normal. It seems odd to me that the OSX version fills the assigned memory with data not being used, metadata alone would be sufficient. Of course this could be another "feature" of 10.10 on a Mac with HDD rather than SSD (see previous rants distributed across the web).
Jun
17
asked QGIS interface very slow on OSX
Nov
11
comment PyQGIS cookbook seems out of date
Thanks for the links. The problems are the same following the non-testing cookbook, and the solution in the second link really only considers that one problem rather than providing a general solution, i.e. an up to date guide. I'm running the latest QGIS (2.6.0) which may, I suppose, be part of the problem.
Nov
11
asked PyQGIS cookbook seems out of date
Nov
11
asked Qgis Python console print statements not working
Sep
24
awarded  Autobiographer
Jul
2
awarded  Curious
Jun
10
comment gdalwarp won't export AAIGrid
The solution you gave is approximately my "workaround". Seems an odd limitation for gdalwarp.
Jun
9
asked gdalwarp won't export AAIGrid
Mar
27
comment Gdal: how to get the max and min altitudes of my topographic raster?
I've put colour highlighting on the commands. Most of the text is the output from gdalinfo and the 'short' version is a couple of comments above here. There isn't any more to it really, gdal_translate -stats fileIn.tif fileOut.tif then gdalinfo fileOut.tif
Mar
26
comment Gdal: how to get the max and min altitudes of my topographic raster?
I've posted a more complete example on my blog (mercergeoinfo.blogspot.com/2014/03/gdalinfo-and-statistics.html). If that's against the rules here then I apologise now. Feel free to remove this if it is the case.
Mar
26
comment Gdal: how to get the max and min altitudes of my topographic raster?
Well, I don't have room to show all the details but using a SPOT4 scene: gdalinfo SPOT4_HRVIR1_042-209_0_080831_111638.tif gave metadata but no min-max. the same command with -mm produced the min-max. gdal_translate -stats SPOT4_HRVIR1_042-209_0_080831_111638.tif output.tif produces a new file and gdalinfo output.tif on that gives metadata with min-max values plus more
Mar
24
comment Gdal: how to get the max and min altitudes of my topographic raster?
OK, gdal_translate -stats requires you create a new file, you can also set the nodata value at the same time. But given that gdalinfo -mm *.tif worked it would seem that the nodata value was already set. -mm is fine for a quick check but it solves one problem, once; calculating the stats properly will give you greater flexibility later.
Mar
24
comment Gdal: how to get the max and min altitudes of my topographic raster?
That should be the MINIMUM and MAXIMUM values returned by gdalinfo. You may have a problem if the NODATA value hasn't been set, in which case you may have a very low MINIMUM value (rarely a very high MAXIMUM instead).
Mar
24
answered Gdal: how to get the max and min altitudes of my topographic raster?
Mar
9
comment QGIS 2.2 documentation
Any idea when the newbie intro will be updated? Ploughing through the API each time the old intro bowls a googly doesn't appeal at the moment (in the middle of writing PhD thesis and need less, not more stress).
Mar
8
asked QGIS 2.2 documentation
Jan
14
comment QGIS toolbox not functional on OSX
Giving up on SAGA. Getting some odd comments from make: ld: warning: directory not found for option '-L/Users/gkhanna/build/x86_64-apple-darwin11.4.0/libstdc++-v3/src' I have no idea who gkhanna is (may work for IBM) but that and ld: framework not found GDAL mean that I am switching to Arc. Jesus! Do I really want to do that?
Jan
14
comment QGIS toolbox not functional on OSX
Well SAGA wasn't working. Trying to reinstall using sourceforge.net/apps/trac/saga-gis/wiki/… but make fails for saga as it claims not to be able to find GDAL !!!!
Jan
14
comment QGIS toolbox not functional on OSX
Will check the individual installs of SAGA and TauDEM but the GDAL is definitely ok.