DEM with lat/long coordinates

[BenjMy]

Issue when creating a mesh from a DEM with the specification of xll_corner and yll_corner.
The returns mesh does not have the same dimension as the dimension of the raster DEM.

Also need to check if the mesh is correctly updated once produced/after modifying prepro inputs i.e.;

• simu.update_prepo_inputs(change1), simu.update_prepo_inputs(chnage 2), is change 2 applied?

Try to reproduce it with Weil et al example

simu.update_prepo_inputs(
    DEM=dem_mat,
    xllcorner=1e4,
    yllcorner=4e3,
    nstr=20,
    zratio=zr,
    base=max(zb),
)

simu.update_parm(TRAFLAG=0)
simu.create_mesh_vtk(verbose=True)