In 2008, I made low poly models for Nav N GO as a freelancer.
The models had to be done from 200 to 500 triangles, but the lesser the better.
They gave me the coordinates, but I had to find out the dimensions and all the major informations about the buildings by myself.
I made the UVW maps too for the models, but the texturing was not my task.
Here are some buildings from this project.