Reader `resampling_method` has no effect when doing Reprojection

[vincentsarago]

Reader `resampling_method` has no effect when doing Reprojection

[vincentsarago]

From the discussion:

Ooo I think I know what's going on 😬

when we are doing reprojection (using WarpedVRT) we are creating a VRT which is aligned with the bounds (This is to make sure we fetch the overviews)

rio-tiler/rio_tiler/reader.py

Lines 360 to 366 in 775ecfd

	vrt_transform, vrt_width, vrt_height = get_vrt_transform(
	src_dst,
	bounds,
	height=height,
	width=width,
	dst_crs=dst_crs,
	)

Because the VRT will be of the same size as the desired output, there will be no downscaling/upscaling happening there

rio-tiler/rio_tiler/reader.py

Line 226 in 775ecfd

resampling=io_resampling,

which is why the resampling_method will have no effect 😭

[vincentsarago]

@DanSchoppe I think we are good to go with #648

gist: https://gist.github.com/vincentsarago/299c368cfa696dec84511d97709d64a6