Quote Originally Posted by waldronate View Post
What does that histogram analysis look like on an Earth-derived heightmap?
I don't know.

Can you provide a pointer to one that I can try? A quick Google search turned up ways to get heightmaps of regions (e.g. http://www.tt-forums.net/viewtopic.php?f=29&t=27052 ) but I haven't found a complete one yet.

Quote Originally Posted by Redrobes
Whilst it looks bad on the histo, it is supposed to be a 16 bit PNG so its a smallish section of 65K levels instead of 256.
That's one of the problems that I realized when I woke up this morning. I guess I'm going to have to write my own utilities to do the kinds of manipulations I want to do to the height values.

Do you know what scale factor was used when the translation was done between the altitude and the 64K binary values?

I'm guessing that the large spike is due to the coastal regions of the continental shelves, so presumably is near 0.