The pic shows a flat image inserted into a sketch, over a fairly complex terrain model.

Is there a way to project the image straight down to model? Within the SW part... It would be helpful to have the picture ON the terrain solid as I add buildings and such. My goal is not a photoworks picture. I'm pretty ignorant about illustrating and mapping images and such but if someone said it can be done I'd learn. If it just plain can't, I don't want to waste time on it.