[Qgis-developer] Raster based terrain analysis with QGIS

Tim Sutton lists at linfiniti.com
Fri Aug 21 18:09:13 EDT 2009

Hash: SHA1


Hugentobler Marco wrote:
> Hi QGIS devs
> I'd like to announce the QGIS raster terrain plugin. It calculates slope, exposition, ruggedness and total curvature based on a 3*3 window for each cell of a raster. The plugin keeps attention that only three raster rows are in virtual memory at a time, so it is also possible to process large rasters.
> If you like to test the plugin, you find the source on:
> http://karlinapp.ethz.ch/raster_terrain_analysis.tgz


> Just unzip it in the src/plugins directory and add 'raster_terrain_analysis' as a new subdirectory in src/plugins/CMakeList:
> SUBDIRS (copyright_label 
>   delimited_text 
>   interpolation 
>   north_arrow 
>   scale_bar
>   oracle_raster
>   raster_terrain_analysis
>   )
> Note that the code is not well tested yet, so drop me a mail if a result seems strange or you have other comments / suggestions / code improvements.
> I thought that this plugin could ev. go into the upcoming analysis library of QGIS. Btw. are there any objections on merging the branch with the analysis library after the release of 1.2 and using the library for the interpolation and raster terrain plugin? fTools will come later I think as it probably is a lot of work to port the python code to C++...

Yes I think its a great idea to merge it with the analysis branch / make
it part of the analysis lib - I was hoping to work some more on that in
the hackfest too.


- --

Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
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