Reprojecting south-up images

[drnextgis]

All works as expected for north-up images. But for south-up (does telluric intent to support such images?) we have some problems are appeared at least while reprojecting. I've tried to rescale images and faced with the following issues:

• in-memory reprojection switches sign of affine e
• result image of non-in-memory reprojection is matched with rasterio warp but not with gdalwarp
• result image of in-memory reprojection is not matched neither with rasterio warp nor gdalwarp

I have prepared two notebooks:

• north-up image (all works without any issues): https://gist.github.com/drnextgis/e6deadf0f83f30f9d2ea438b3c42f556
• south-up image (has issues described above): https://gist.github.com/drnextgis/b3476cb0a102a5be3888e89f9fc5ddab

Such south-up images are used in our tests, for example: https://github.com/satellogic/telluric/blob/409082367dbf335468483837b5568494a212c99b/tests/test_georaster.py#L31

[astrojuanlu]

does telluric intent to support such images?

I would say yes: https://github.com/satellogic/telluric/pull/78

[astrojuanlu]

I now saw the notebooks (glad to see you also study the mask issue, ref #94).

I think we should support these images, in the sense that operations on them should return consistent results. The question for me is how.