[gdal-dev] [feature request] add smoothing parameter to gdal_grid invdistnn algorithm?

[stellasia]

Hello,

I am a new gdal user (less than one month), trying to generate a raster
with gdal_grid utility.

I was wondering why there isn't a smoothing parameter with the invdistnn
algorithm in gdal_grid?

I am facing a problem where I would like to have both the nearest
neighbours (to limit radius of influence) and the smoothing in the average
computation, but maybe I misunderstood the purpose.

If you think that adding a smoothing in this case is relevant, I can submit
a PR with a patch suggestion.

Best,
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