Is it possible to have, at the beginning of the game....perhaps in the "Where are you?"screen where you choose your starting conditions, an option called "Prefferd Start Location"
Instead of asking for an impossible thing here is the greatest reason to play a map, generated in the editor.
1. Made in 5 minutes this map will save you a lot of time for Ctrl+N restartings.
2. You can place AI opponents in balanced positions instead of realizing their poor achievements on a 50th turn.
3. You can add many things that are not used in random maps, such as quests, units and locations.
4. Though you will know the shape of the map, the resources will be placed randomly each time you start the map, so each time you play this map, each time it will be different.
If you play a random map you should accept the rules of randomness and your satisfaction of this playthrough will also be affected by random factors. Or... make a map and enjoy!