The nearer to the eye these are intersected the smaller the image of their cause will appear" [Doyle, 19641. In 1492 he began working with perspective and entral projections with his invention of the Magic Lantern[Gruner, 1977], although there is no evidence that he actually built a working model and some claim the device actually dates back to the early Greeks, The principles of perspective and projective geometry form the basis from which photogrammetric theory is developed Many of da Vinci's artistic contemporaries contributed to the