This is once again more detailed but lower resolution:
Have you tried Google Maps/Earth?
this one is going be great help thank you. I work off google earth too, for some detail too. right now start to place object on the map. just clicking rocks and more rocks, checking some picture to try get close to the look.
I have full east and west island up, been thinking of just east island, what size it would be ? right now 40x40 lost lot detail 40x40, will work good for ship battle, and planes, as there few trees more of a deserter of grass and forest of rocks.