Wannabe World-Builder saying hello!

[Nevermet]

Hello there!

I'm Nick the Nevermet, and I recently decided I wanted to try and improve the quality of my maps, so after a quick Google search, I found this board. I actually did this a few weeks back, and since then I've been making my way through RobA and Wisemoon's excellent tutorial for GIMP.

Looking at the various boards, I hit information overload quickly (in my defense, I'm sick at the moment), so I'm likely going to ask a few questions which have obvious answers ("erm... go to the Forum with exactly what you want as a Title"). However, as I'm a newbie here, I hope you won't judge me too harshly.

My immediate question is are there any good tutorials on how to make large cities as if they were observed from a satellite? (directly overhead, something approaching photorealistic, etc.) I ask because I found excellent tutorials for other styles of city map.

Anyhow, that's all for now. Thanks!