A full-fledged map "from satellites" is an excellent map without bugs and jambs. Works both in sump and in single player. Actually, this map is already like 10 years old, and in the original it was made by Ian Albert, at a resolution of 256x256px. But today's gamers crave more resolution, which is why a larger version of it was made.
Resolution of this map: 512x512px and 1024x1024px, to choose from.