Krapougnak wrote:Otherwise when making new maps use 70 as the minimum height.
No, such a minimum height will make map making overly complicated. You always want something near 0 as minimum on your map, regardless of whether there is water on it or not.
The problem here, is that the map is way too high. Don't make such enormous cliffs. Cliffs a third of that size are more than enough and possibly still too much. It also makes it hard for planes to fly. If the highest point of the map is too high, then the lowest will just be cut off. There barely is any reason for making a map higher than 40 if the lowest point is at 0.
I've photoshopped the heightmap a bit, chaning the brightness and contrast. This way, almost all land will remain land and all markers (Mass, Hydrocarbon spots) remain on buildable areas. After you've imported the heightmap, there are two things you have to do to be sure the map is both playable and you don't get floating things.
1. Go to the markers menu, select all markers (from the list, using click and shift click to select them all there, ctrl+a will not work here), then go to one of the markers on your map and hold shift and move the marker a bit (just a little bit, because you're going to move them from the original floating spot to the ground, and there is no way to keep the coordinates exactly the same). As the marker moves, it snaps to the ground level and because you've selected every marker, they'll all nicely go to the correct height.
2. Do the same for the props. Go to the props menu, press crtl+a (this time that works) and hold ctrl to get them to snap to the ground. Hold shift to force some movement (not holding shift should allow you to move the props slowly and more precisely, but I didn't get any results that way).
Then every floaty thing is aligned to the ground again and the map is properly playable.
Oh, I like the design.