I see carvings of relief maps now and then. Either they are hard to find or I don’t know where to look but I can not find relief maps online. Either a 3d file or grayscale relief svg. I have checked government site and get downloads but they were file types I have never heard of and I didn’t know what to do with.
Can someone please share a site where these are available and/or what files I should be looking for?
Thanks for any help