On 13.03.2018 09:54, Rutger wrote:
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
gdal_grid's capabilities.
Yes, you're right, I was just a bit flabbergasted that it looked so bad.
There's nothing to make it smooth.
The QGIS "bindings" to GDAL are a bit limited, perhaps there hasn't been
much interest in expanding them from the initial commits(?). I believe
there are also some things that could be thought as bugs - I did a PR(*)
a year ago which was not merged (but the issue has been fixed since) - I
think a good review of them would be useful. I fixed one issue
recently(**) but it is a rather slow process.
Ari
*) https://github.com/qgis/QGIS/pull/4220
**) https://github.com/qgis/QGIS/pull/6564
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