Incorporating physical boundaries (e.g. coastlines, lake contours) in the calculation of the UD

[JackAbrand]

After chatting with Simon, it appears that the UD50poly & UD95poly objects within plotraster (created by stars::st_contour) do not incorporate physical boundaries. It would be great to be able to incorporate physical boundaries into the UD calculation.

[libertyboyd]

I concur with Jack's comment.