surface angle in each cardinal direction

Discussion created by todd93 on Jan 22, 2013
Latest reply on Mar 12, 2013 by MBoucher21

For a DEM, I would like to calculate the surface angle (i.e. slope) for each grid cell in the 4 cardinal directions (N, S, E and W). In other words, for a given cell, what is the angle between a flat plane and the DEM surface in each direction.

For example, a grid cell located on a 45 degree slope facing due west (270 degrees aspect) would have angles relative to a flat plane of 0, 0, 45 and -45 (or 225) degrees for N, S, E and W respectively.

Does anyone know how this can be generated using Arc? I imagine it would require generating 4 separate grids, one for each direction.