The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography
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The Face of the Earth as Seen from the Air - Willis T. Lee
Willis T. Lee
The Face of the Earth as Seen from the Air
A Study in the Application of Airplane Photography to Geography
Published by Good Press, 2022
goodpress@okpublishing.info
EAN 4066338077080
Table of Contents
INTRODUCTION
Airplane Photography: Its Development and Application
Acknowledgments
CHAPTER I THE VIEWPOINT (Figs. 1 to 4)
Oblique and Vertical Airplane Photographs
Elements to Be Recorded
How to Read Airplane Photographs
Failure of Air Photographs to Show Relief, and Measures to Remedy This Defect
CHAPTER II FAMILIAR SCENES FROM A NEW ANGLE (Figs. 1, 3, and 4)
CHAPTER III ARCHITECTURE, LANDSCAPE GARDENING, AND ENGINEERING (Figs. 5 to 14)
Architecture and Landscape Gardening
Engineering Projects Covering Large Areas
CHAPTER IV THE MOSAIC (Figs. 13 and 22)
CHAPTER V GENERAL ASPECTS OF THE SURFACE AS SEEN FROM THE AIR (Figs. 12 to 18)
CHAPTER VI MARSHES AND MARSH DRAINAGE (Figs. 19 to 27)
Marsh Drainage
Thoroughfares
CHAPTER VII COASTAL MUD FLATS (Figs. 28 and 29)
CHAPTER VIII SUBMERGED LAND FORMS (Figs. 30 to 33)
The Best Conditions for Photographing Underwater Land Forms
CHAPTER IX THE PLAIN FROM THE AIR (Figs. 34 to 41)
A River on the Great Plains
Meandering Streams on the Coastal Plain
The Glacial Drift Plain
CHAPTER X MOUNTAIN FEATURES (Figs. 42 to 52)
CHAPTER XI AIR CRAFT IN THE STUDY OF ROCKS AND ORES (Fig. 53)
Use in Exploration
CHAPTER XII MAPPING AND CHARTING FROM THE AIR (Figs. 54 to 82)
Scale and Horizontal Control Of Vertical Photographs
Use in City Mapping
Use in Revision of Existing Maps
Use in Coast Charting
Experiments by the United States, French, And Other Coast Surveys
Improvements Under Way Point to Promising Outlook for Airplane Photography
INDEX
INTRODUCTION
Table of Contents
Scarcely a generation has passed during the evolution of the airplane from a ridiculous dream to a practical factor in the work of the world. Men who once read with derision, or only passive interest at best, of the experiments of Langley, Chanute, and the Wrights have seen the airplane developed suddenly into an indispensable instrument of war and an agency of demonstrated value and of such diversity of application that its future is hard to estimate.
The navigation of the air has accomplished much in many fields. Not only does it offer a new means of efficiency in military reconnaissance, rapid delivery of mail, fire patrol of forests, and the constantly increasing number of commercial and scientific pursuits to which it is being adapted; but it has also opened a new world to the geographer, the physiographer, and the geologist.
Airplane Photography: Its Development and Application
Table of Contents
Very early in the war the airplane was recognized as a useful, in fact a necessary, means of observing enemy positions and movements. But the speed of the airplane was found to preclude the taking of more than the most hurried of notes during a flight, and notes written from memory are not the most satisfactory. Photography was found to obviate this difficulty. The ability of the camera to make instantaneous exposures and fix a clear image on a photographic plate enabled the observer to obtain a record not only of the scenes that he had viewed but also of many that he might have missed while engaged in the necessary business of watching the sky for the enemy—a record that for detail and accuracy could not be approached by the most elaborate notes or the most graphic description. Immediately inventive genius was set at work to adjust the mechanism of the camera to the demands of air photography and to prepare the rapidly working films and highly sensitized paper necessary for the best results.
So satisfactory were the results and so great are the possibilities of further adaptation that there is an unfortunate tendency on the part of certain enthusiasts to make exaggerated claims that may react to retard progress. This is particularly true in the use of the air photograph in mapping. There are limitations to this use of air photography. It cannot be reasonably expected to do away entirely with the ground work of the surveyor. Rather, the camera is to be regarded as one of the instruments of the surveyor. Observation from the air can never take the place of close examination of the ground, but it can be of great use in the location and study of land forms and geologic relations. Air photography is only an added means of obtaining information, although it promises to become a very important means.
Observations from the air described in numerous reports and articles in geographic magazines during the war and since its close indicate that air craft, especially in connection with air photography, can be of great use in studying the physical features of the face of the earth. In order to make a practical test of the use of the airplane in the study of geography the writer spent about nine months during the year 1920 making flights, taking pictures from air craft, and gathering information from various sources. This book embodies the chief results.
The material presented here is by way of illustrating the possibility of using the airplane and airplane photography as a means of securing information that should become increasingly useful in the study of geography, and of showing geographic and geologic features better than in any other way. The views have been chosen to illustrate the three uses of air photographs with which this book deals—the presentation of new views of subjects of popular interest and the practical value of such views; the study of land forms from a new and advantageous point of view; and the use of the air photograph as an aid in mapping.
In presenting these illustrations there is no intention that the list of types should be considered in any sense complete. Physiographic observation from the air is a relatively new undertaking, and results are limited and imperfect. As improvements in mechanism and technique are made, observations will be extended and better photographs and a greater variety of them will be secured. Such as are presented here, however, serve to demonstrate that the air photograph will come to be recognized as a valuable source of information for the student of geography and geology.
Acknowledgments
Table of Contents
The results here presented were secured by the co-operation of the Air Services of the United States Army and Navy. Hydroplanes were placed at my disposal on several occasions, and a number of flights were made over water bodies, particularly over the Potomac River, Chesapeake Bay, and New York Harbor. But the information was gathered chiefly through the Army Air Service. Many flights were made in army planes, some for general observation, others for photographing specific objects. Also the army photographers,