Originally published in 1925, this book describes experiments at Cambridge regarding problems arising in the construction of maps from aerial photographs.

Authors' foreword; Preface H. Hamshaw Thomas; 1. Introduction; 2. The problem of photographing the whole ground; 3. The problem of making a map from the photographs; 4. Preliminary experiments; 5. Mapping by mosaics of vertical photographs; 6. Mapping by navigation and oblique photographs; 7. Equipment and detailed procedure; 8. Training; 9. Conclusions; Appendix 1. The methods used in the study of random errors; Appendix 2. Pilots reports of the flights discussed in chapter 4; Appendix 3. Part I. On the influence of a steady rate of change of wind upon the accuracy of navigational control; Part II. On the elastic adjustment of errors in a navigationally controlled survey; Appendix 4. On the construction of graticules for the measurement of relative azimuth angles and depressions below the horizon; Appendix 5. On the probability of error in the estimation of height by the methods of chapter 6; Appendix 6. On the correction of the air-speed indicator for variations in air density; Appendix 7. On the wind gauge bearing plate and its uses in aerial surveying.