Oh, there's a minor mistake in the example, you roll for 'south' rather than 'west', and then on the image there are two 'rocky terrains' and no outcroppings. I'd also colour obstructed and open differently :)
Thank you for the nice comment! I wrote all these modules so fast after each other, that I’ve forgotten most of the contents myself. Your comment made me go back and read it, and go, “well damn, that IS solid work”.