My goal is to make world map of my fantasy world and then all maps of kingdoms with more details. First i began with photoshop - it is very powerfull (but there are a lot to learn). Then I began with CC3 - its very nice, but there is a problem - i can't draw a coastline log enough - after about 1/4 i can't add any more point (my map is very big - i was going to build huge map with detailed coastline and then divide it to smaller ones). Second thing is editing - I can't find any method of editing existing coastline - add more points etc.

What program is better for big maps?