GIS student hoping for a bit of wisdom on the Path Distance tool. I am doing a ski slope analysis, trying to find runs using cost grids (that incorporate slope, aspect, avalanche risk, etc.) While I am familiar with the cost distance tool for finding the path of lowest cost, I wanted to see if there is a way to find paths that are: 1) of lowest "cost" in terms of my cost grid, 2) always sloping downhill (or at least remaining flat). I have played with the path distance tool for a while now, and the documentation is limited. Is this the right tool to use? I've been setting the vertical factor parameters with my DEM to have a zero factor of 1, a low-cut angle of -90 degrees, and a high-cut angle of 0 degrees. This produces a grid containing only one cell, with value 0.
Any thoughts or advice?