The development of German aerial photography is strongly bound up with the Rheinland. In this description, therefore, particular attention is paid to the Nordrhein-Westfalen district. In the production of aerial photo graphs a considerable part has been played by progress in photographie techniques and the optical precision industry, and also by the perfecting of the motor. Photographie pietures on iodised silver plates were produced in 1838 by the French painter Louis Jacques Daguerre. The exploitation of aerial photo graphs for scientific purposes was pioneered by Felix Tournachon, called...