Hello, I am currently working on a large continent map for a large, continent spanning empire. My favorite map is this one: http://www.cartographersguild.com/showthread.php?t=8255 TORENTINE: Political Map.

The continent is roughly 150% the size of Africa with very few deserts, some mountains and a large number of rivers (navigable rivers play a big theme in the nations development).
My problem is this: I want to meet the level of detail of the TORENTINE: Political Map, but 'zoomed out' to focus more on the major roads and cities. How big should I make my file? Right now its roughly 2600x2600 but that doesn't provide much detail.

Secondly, what would be the best way to go about adding rivers in? Any ways I can generate them or do I need to just hand draw them in?

By the way, does anyone know of a google-maps style map tiler but for images? Something like this: http://maps.osm2world.org/ I am just thinking ahead when it comes to sharing this thing in an easy way.

Here is what I have so far. I would like to start from scratch again so I can make it far larger and more detailed, this was more of a learning experience for me.

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