Wolf, A stand with a clinometer on it(for measuring the angles.) It is a nice idea but as you soon discover it's too much work for the results you are likely to get. Someone like Zhann with expertise in both art and science might benefit with patience and trial and error (and a brunton compass) but most likely not. if it were to trace the outlines of the buildings along the lines of a magic wand it might work better but even then ... still It could be useful...can't entirely rule it out. - TJ