This is a major item on my to-do list that I keep putting off, nominally because there isn't a good tool for doing this and all the other related and interconnected map-editing tasks. (As I've
lamented on my blog a few times.) How did you decide what to put where on your map.
(On the other hand, I recently did something similar to the map I'm using for the current campaign of my strategy game---except that the world is all but empty now and fairness and small-scale verisimilitude are more important goals than big-picture realism, so randomly generating a few things for every tile was a reasonable strategy that worked well there, but would not be suitable for any map for the Shine Cycle.)