Citabria,
No, the grid squares are all the same size no matter which size map you decide to build, (they're all approx 25 miles square). However the real question is: What makes it easy to see which grid square a con is in?
The answer is the grid squares drawn on the clipboard map.
If you want to make it more of a guesstimate remove the grid squares from the clipboard map and rock on from there. It's a bugger trying to guess where a con is in relation to an airfield when there are no grid squares marked on the clipboard map.
BTW my reply to skippy was lacking the [sarcastic=on/off] switches. I mean seriously, if you don't like the maps currently then building a new terrain seems the obvious answer don't you think, (that is untill skippy finds out how much work is actually involved with making a new map =).
Spotcha in the Air