GVII-10 
PHOTOGRAMMETRIC ENGINEERING 
surveyors and surveying technicians who have already completed their study. 
Courses in forest photogrammetry (photo-interpretation), 2-4 days in the room 
and 1-2 days in the field, have been given about ten times since 1952, and nearly 
200 foresters have taken part. Some big forest companies have their own courses 
and research in smaller scale. At the Royal School of Forestry as well as at the 
School of Forestry there are longer courses, and the five subordinate forest 
schools now have training in photo-interpretation for 2-4 days. 
In Norway, training in photographic interpretation is now started at the 
forestry schools and at the University of Agriculture—forestry division—and 
some short courses are arranged for special groups of forestry employees. 
In Pakistan the officers of the survey department have been trained in the 
application of photo interpretation for topographical and large-scale surveys 
required for development projects, etc. 
Photographic Reference Material 
A REPORT ON THE AMERICAN SOCIETY’S PHOTO INTERPRETATION HANDBOOK 
About 2\ years ago, the American Society’s membership was interrogated 
as to the desirability of the Society’s undertaking the preparation of a Manual 
of Photo Interpretation, Such a manual was to constitute a companion 
volume for the Society’s highly successful Manual of Photogrammetry. Care 
was taken to sample the opinion of a representative group of members, photo- 
grammetrists as well as photo interpreters. Approximately 80 per cent of those 
interrogated expressed the opinion that the preparation of this Manual should 
be undertaken at an early date. Accordingly, the Society’s Board of Direction 
authorized the Committee on Photo Interpretation to proceed with this prep 
aration. 
It is appropriate to present the general organization of the Manual, as 
decided by the Committee after due consideration of the many helpful sugges 
tions which Society Members submitted. Further suggestions and offers of help 
are solicited from all those interested in photo interpretation, and should be 
sent directly to those responsible for the various chapters. 
TENTATIVE CHAPTER OUTLINE MANUAL OF PHOTO INTERPRETATION 
Preface (Comparable to page v of Manual of Photogrammetry) 
Acknowledgments (Comparable to pages vii and viii of Manual of Photo 
grammetry) 
Chapter I.—The Development of Photo Interpretation 
(Author-editor: Arthur C. Lundahl, 4401 Chestnut St., Bethesda, Mary 
land) 
Historical Background 
Present Status 
Future Prospectus 
Bibliography 
Chapter II.—The Procurement of Photography 
(Author-editor: Robert N. Colwell, 243 Forestry Bldg., University of 
California, Berkeley 4, California) 
Introduction: (Brief statement of scope and purpose of chapter) 
Present Status of Photo Coverage Throughout the World 
The Procurement of Photos from Existing Coverage 
The Procurement of Photos When Suitable Coverage Is Not Available 
Aerial Photo Specifications (Consideration of Film, Filter, Scale, Parallax,