Using the same coastline for regional and world maps
I've been working on my world map for some time now and I really like it, but I'd like to start developing some of the regions in greater detail. My question, I suppose, is this: is there some easy way in Photoshop (cs5 or 6) to easily use the same coastline of a region? For instance, is there an easy way of taking a selection of the layer outline and scaling it up without it becoming messy and pixelated? Do any of you have any tricks for this sort of thing?