I made a quick concept of the map:

i mapped the basic concept (no textures yet) to get the scale quite ok..
still needs fiddleling (especially the underground-part), though.
Colored minimap is as following:

some more images are under:
http://pwning.de/stuff/mapping/seaside/
testserver (4.1) is running under:
pwning.de:12345
password: secret
auto-download: on.
What do you think about it?