Thanks. Another idea I had was, if you are going to have two different scale maps for an area (say a 1:50k or 1:100k for a big picture view, and a 1:24k or better for a specific area) Then you have the wide angle aerial photo on the back of the closeup topo map, and vice versa. That way you can lay a topo map down next to an aerial photo (at the same scale), have two different scales available, and yet only have two pieces of paper. Does that make sense?