Quote Originally Posted by alpaca
Oh, BDH, do you know what the latitude parameter means in descr_terrain.txt?
This would probably be related to the projection used, wouldn't it?

And I think that CA used something similar, at least for the height file. It has the same file format as another radar topography satellite project...
i know of the parameter, i don't know what it does but I do know what it specifies
this pic should help explain

basically, what they did was specify 4 points. The nothern points are on the same latitude and the southern points are on the same latitude. The left points are on the same longitude and the right points are on the same longitude. Why then isn't there a specifier for longitude then if that has something to do with it? Well, in order to make their projection, they drew a STRAIGHT line (as it would be perceived form space) across the points that have the same latitude. Thats how they made their map projection. The longitude lines had nothing to do with it since they were used as normal for the width of the map.

What it specifies in game i am not sure, but my guess is that it has something to do with the tilt of the map. If you look to the edges, you can see that it is tilted.

As for the hgt file, to the best of my knowledge CA just ripped them off :)