I am trying to generate a raster with many pixels (10240x10240) using the
gdal_grid tool but I have problems choosing the right interpolation algorithm.
I have a dataset with varying point density (ie some places have a lot of points, others have fewer).
- With the
invdistalgorithm, I have "false" results because points far away from a pixel can influence it too much due to their greastest density
- I tried to use the
max_pointsparameters, but it seems gdal does not take the closest ones, so the result in meaningless (for my case)
- Using the
invdistnnalgorithm seems to be the solution, but there is no smoothing paramter here which I need because points have a non negligible dispertion.
(I know I could increase the data density artificially where points are missing, but then the computation time becomes very high so this is a solution I would not like to go with.)
Is there a solution to use a smoothing with the
invdistnn algorithm ?
I am using GDAL 2.1