It looks alright to me. The moving average algorithm searches (for each
pixel) for points within the specified radius, and then averages the values
of all those points.
"gdal_grid" also supports inverse distance or linear interpolation if you
want a more smooth result.
It is perhaps surprising that QGIS only exposes a small subset of
Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html
gdal-dev mailing list