When my boss asked me to do these maps, I was very confused. How could I do without any 2d conception? We had a lot of discussions when I had problems to each map, and tried to make something interesting by associating with the names of these maps. I finally finished them, and also made them lively.....uh...maybe just I think so : P
I tried to draw something not always portrait.
At first it was tough, and I erased it again and again, I thought I would fail, but finally it went well, also shocked me :P