This book combines the knowledge and experience of the members of the instructional staff of the Abrams School of Aerial Surveying and Photo Interpretation. Aerial mapping and reconnaissance had become vital by the middle of the second world war, this is an instructional guide compiling all of the knowledge on the subject gathered up to the point. Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.