transformCRS.3d: Transform coordinates reference system (CRS) of a 3-D track
Description
Attention: Please use this function for CRS transformations,
since it is based on the st_transform from the sf package and therefore
supports CRS transformations in 3-D. Note: spTransform from the sp package
only supports transformations in the 2D plane, which will cause distortions
in the third dimension.