Fwd: [Qgis-developer] Raster based terrain analysis with QGIS

[Marco Hugentobler]

Hi devs,

The raster terrain plugin is in trunk now (at the moment without analysis lib, 
but I plan to do that soon).

Regards,
Marco


----------  Weitergeleitete Nachricht  ----------

Betreff: [Qgis-developer] Raster based terrain analysis with QGIS
Datum: Freitag, 21. August 2009
Von: "Hugentobler Marco" <marco.hugentobler at karto.baug.ethz.ch>
An: qgis-developer at lists.osgeo.org

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++...

Regards,
Marco



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-------------------------------------------------------

-- 
Dr. Marco Hugentobler
Institute of Cartography
ETH Zurich
Technical Advisor QGIS Project Steering Committee