I've attached the map and the heightmap in a zip. Some advice on how to go forwards would be great!

<t> Hey so I've successfully loaded in a map file and everything has gone fine - except that the majority of the map is labelled as impassable terrain. There is coastline in the map so I'm wondering, is it because the coastline is such a lower altitude to the rest of the map (between 600 and 1600 m ...