Repost from here: https://www.cartographersguild.com/s...795#post431795

Quick question about this method. I guess you have to take DEMs from similar latitudes on Earth to the latitudes you want to place them in in your own map. DEMs are in Equirectangular projetion I think so if you took one from Greenland and pasted into an equatorial region it would look stretched, wouldn't it? Normally you wouldn't do that unless you want fjords in your tropics as Slartibartfast did, but if you change the latitude of a patch significantly for whatever reason, or if your target projection is significantly divergent from equirectangular (e.g. if you were making a regional map of an area in a high latitude or you were placing high-latitude DEMs onto a map of a "flat" world), you would have to reproject it, wouldn't you?