R: rotated raster is cropped when terra:rectify() is applied

Question

I have a geotiff that I read with rastertif <- terra::rast(x = tif) This produces the following warning:

[rast] the data in this file are rotated. Use 'rectify' to fix that

So I use rectify like this:

rastertif1 <- terra::rectify(rastertif)

This rotates the raster, but the rectangle is cropped - see the following plot:

The plot should show a completed rotated rectangle, but some parts on top and on the right hand side are cropped.

Any idea how the raster could be rotated while keeping the full extent?

Answer 1

I manually enlarged the bounding box of the SpatRaster like this:

e <- terra::ext(rastertif)
e$xmax <- e$xmax + 3000
e$ymax <- e$ymax + 3000

ext(rastertif) <- e

rastertif1 <- terra::rectify(rastertif, aoi = e)

Now, my raster is not cropped anymore after rectifying: