between level 4 and level 5, meaning that the terrain was gently
sloped.Sometrails located on the hillside exhibit higher slope levels
that are often associated with a more complex terrain. The trails
were draped on a three-dimensional terrain model (Fig. 4) to better
visualize that steeper trails are located on the mountain hills on the
east, west and south sides of SNEA. In contrast, trails in the central
part of the SNEA are flatter.