1,219 reputation
518
bio website
location South Africa
age
visits member for 2 years, 1 month
seen Jul 18 at 12:11

Nov
27
comment QGIS and Ubuntu 'browse' dialogue causing crashing
@Mapperz can you recreate if qt-at-spi is installed?
Nov
27
comment QGIS and Ubuntu 'browse' dialogue causing crashing
This will affect accessibility functionality, so if that is important to you, this solution is not recommended.
Nov
23
comment QGIS and Ubuntu 'browse' dialogue causing crashing
I have the same issue on Ubuntu 12.04. I've also had file dialog problems with Scribus so I suspect it's a Qt issue rather than QGIS. Did you manage to solve it?
Nov
20
comment What's the difference between EPSG:4326 and EPSG:900913?
Yes, it does. The two are exactly equivalent.
Nov
20
comment What's the difference between EPSG:4326 and EPSG:900913?
You may have been thinking of EPSG:3857, which is the other commonly used Google projection, and it is the same as EPSG:900913.
Oct
27
comment How to use field calculator from QGIS Sextante plugin
After looking at the code, it seems that Sextante implements its own version of the field calculator, and can only handle arithmetic operations. Case statements are simply not possible with the current implementation of Sextante's field calculator.
Oct
26
comment How do I access layer attributes from within QGIS' manageR plugin?
It could be that this is a bug, since a Google search on "> manageR import function" comes up with a number of seemingly unresolved issues (e.g. lists.osgeo.org/pipermail/qgis-user/2010-September/009653.html). Confirmation on whether the above result is incorrect (i.e. whether pressing the import button should result in something other than > manageR import function) would also be appreciated.
Oct
24
comment How to use field calculator from QGIS Sextante plugin
On simple tests (e.g. bufQGIS * 2), the field calculator works, but all apostrophes should be removed from field names. I have not managed to get even a simple case statement to work yet.
Oct
24
comment How to use field calculator from QGIS Sextante plugin
Looking at the error log, I thought it might be a result of mixed string delimiters (" and '), but I tried changing them all to ' and it still had the same result
Oct
8
comment How to make 3D building models from lidar data?
Similar to this question: How to distinguish buildings from vegetation in LIDAR data?
Oct
8
comment Help needed with the rendering of QGIS Heatmaps
Have you seen this tutorial? It's quite comprehensive, and might help you to see where you're going wrong.
Oct
5
comment Create a polygon layer from point data
A completely different approach, but you might consider heat maps. For points with high resolution you could set low radius but high weight (using the QGIS heatmap plugin); for points with low resolution, you could do the inverse. Note that I haven't tried this myself, so I'm not sure it would work like I imagine. Might also be a more organic result than what you're looking for.
Oct
5
comment Is there a way to load a kml raster super-overlay in QGIS?
To get this to work I had to reproject into Google Mercator - I couldn't get it right with geodetic coordinates.
Oct
4
comment Is there a way to load a kml raster super-overlay in QGIS?
thanks rashad, that looks like an interesting project. It seems it's only for viewing data though, and I would need to be able to do some spatial analysis on top of the base maps.
Oct
4
comment Is there a way to load a kml raster super-overlay in QGIS?
My target users are a small number of people who need access to 1:50,000 national topographical maps as a base layer for simple spatial operations (like area of a polygon). They currently use ArcView 3.2, and I am evaluating the possibility of using QGIS as a replacement. ArcView performs quite well when loading a large number of rasters as tiles, but in my experience QGIS can't handle it. Currently each workstation has the maps loaded, but I'm considering a server approach instead.
Oct
3
comment How can I use py2exe with the OSGeo4W Python installation?
As a followup, I managed to create the exe without any problems using this method. When it came to running the executable, I kept getting ImportError: No module named _gdal. I thought it was a problem with the pyinstaller hooks, but it seems it's actually an environment issue in OSGeo4W, since I could get it to work fine from a regular cmd prompt (ie not o4w shell) as long as the GDAL_DATA environment variable is set. I wrote more on this at StackOverflow.
Oct
2
comment How can I use py2exe with the OSGeo4W Python installation?
@s_a: I can only accept my own answer after 2 days... matt wilkie's solution might actually be the better option, but I suppose this answers the original question more explicitly.
Oct
2
comment How can I use py2exe with the OSGeo4W Python installation?
I ran into a snag with this approach: pyinstaller needs pywin32 to work on Python 2.6+. Fortunately it can be installed using the o4w setup program.
Oct
2
comment How can I use py2exe with the OSGeo4W Python installation?
Thanks, matt, this is a good alternative option and I'll give it a try.
Oct
2
comment How can I use py2exe with the OSGeo4W Python installation?
Thanks, that would work, except for the following: "Note that there can be only one registered interpreter for each major Python release (e.g. 2.0, 2.1, 2,2 etc)" Both are 2.7