Thanks all. I'm tweaking the map and incorporating your comments. I'm also going to add a political version, and a version of the satellite view with some annotation on it. Then I think I'm going to do a slightly inaccurate more 'hand drawn' in world version so it can be used in a roleplaying game world. Accurate satellite and political map for the GM and the 'hand drawn' in game map for players.

I'll post some more iterations once I've taken them a further step.

Thanks for all your comments.

Jim