Hi, I would like to know if gdalwarp does any "average" regriding when the source grid is denser than the target grid regardless of the chosen method for the interpolation. And if there is any document where I can follow exactly the calculations. I tried to follow the code on github but it is pretty difficult to follow.
I've programmed my own bilinear interpolation function in fortran and I got smoother results when I applied -r bilinear with gdalwarp. So i wonder if there is a pre-average regriding subroutine that is not in the documentation page. Thanks!
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