I was just thinking about a problem that happens quite often when a party gets separated. One person will ask "where are you at?" and the response is almost always "Over here".
We need to have a grid overlay on the maps with coordinates, like graph paper. I'm not syaing a full cords system but just an overlay on the maps with a grid zone 1-50 along the top and a-zz along the side. I would say "I'm at d:20" or "there is a trap at x:14". Being a D&D game I'm actually surprised we didn't have a grid in the maps already.