Most parts of the map were created of only about 15 screenshots of the strategic view. Barbarian encampments provide a steady source of income (50G each) and quickly the map unveils.
It’s pretty easy: If you’re not the warmonger you used to be, all civilizations will agree to Open Borders. I took the screenshots in a game of Rise of the Mongols on settler difficulty to easily discover everything. Or look at the resources and plan which cities to keep and which ones to raze. This scenario in Civilization 5 is pretty straightforward: On Deity you have to conquer EVERYONE! The Rise of the Mongols Map is not dynamic, so you can use this to plan your conquest.
