It will be some time before this map/project is anywhere near complete but I thought I would share. It helps to show that I am not just a forum lurker merely learning all I can from the talented persons who contribute here, I also try to contribute a little something as well.
My inspiration for this map concept comes from a city established in the bowl of a non-active volcano as presented in The Shackled City Adventure Path. The center of the city will contain a lake with concentric rings of streets and building rising steadily to the outer walls. I was intrigued by this city design because I thought it would be challenging and kinda fun to portray in the 3-D medium of Sketchup.