understandin EARLY from a grap DEVELOPMENTS omploys Although photogrammetry digital imagery today) photographs(or for measurements, the concepts go back into history oven earlier, In 1480, Leonardo da Vinci wrote the following Perspective is nothing else than the seeing of an object behind a sheet of Hlass, smooth and quito transparent, on the surface of which all the things may Fig be marked that are behind this glas All things transmit their images to the eye by pyramidal lines, and these pyramids are out by the said glass. 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