I want to compute the shortest paths travelling overland between the origin (Africa) and destination (North America). My goal is to recreate human migration, and the shortest path should be across the Bering Strait. First, I have converted a shapefile to a raster, imputing value 1 to land and a large value (999999999,000000) to water. If my first step is correct, I do not have any no_data cell because I pre-initialize it with a value.
Second, I compute the cost using
function under GRASS.
For some unknown reason to me, I must use the
cost raster and the
movement direction map ticking the
The input raster map is a cost surface selector.
I think I cannot increase more the cost of water travelling. How can I modify my workflow to force the Bearing route?