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I want to perform raster smoothing on a DEM file. I want to to assign the elevation of each pixel using the average elevations of its 8 neighbors. The ESRI's "Python scripting for ArcGIS" has a chapter on using python for raster but it did not help me to write a code for this. I'm looking for any useful literature, tutorial, or sample code...! please note that r.buffer and r.neighbors is not a good answer for me since I want to learn how to write this code completely.

P.S: I already took a look at this and this. they did not help me...may be since my knowledge is limited I need more comprehensive answer. Thanks in advance for any help you are able to provide.

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Using the Python GDAL bindings, you should simply update this example:

http://www.gis.usu.edu/~chrisg/python/2009/lectures/ospy_hw6a.py

Suggestions:

  1. use from osgeo import gdal instead of import gdal
  2. import numpy (to be installed) instead of Numeric;
  3. adapt the outData[i,j] expression to your need, simply changing the coefficients;
  4. some cosmetic corrections in the print messages and...
  5. above all, thanks Chris Garrard, the author of the Geoprocessing with Python using Open Source GIS courses.
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