Autodesk Infrastructure is used in the architecture/engineering/construction world for this sort of thing. It is essentially a prototyping tool to combine any early stage data you have (aerial surveys, a mockup 3D model for a building, etc.) with existing geospatial data. It will give you terrain, roads, and buildings to varying degrees of accuracy.
A lot of the more experimental Autodesk products are of limited use outside of America due to forcing you to use their own cloud services. Many governments and defence-contractors don't allow use of foreign servers/cloud services external to the country they're in.
It's pretty frustrating, because it's rare for Autodesk to consider hosting servers anywhere OTHER than America, and I wanna play with the new toys :S
https://www.autodesk.com/products/infraworks/overview?term=1...