From a personal standpoint, I would choose Icarus or Moonbase; however, since those maps are hardly realistic I probably wouldn't survive. From a more realistic standpoint, I would choose SG2 for multiple reasons. The first reason is that there are, or was, animals on the map. Also, since it is an abandoned city, there would probably be canned food or preserved food of some kind left over after the inhabitants left. Also, since the map is pretty big, there are plenty of places I could hide from, or run away from, any predators or hunters. I would have said Treacherous Heights, but there is too much open space. Plus, it is a snow environment, which isn't suited for people who aren't prepared for it; whereas, SG2 has a very temperate climate. This is if I was thrown into these environments in the real world.