REPORT OF COMMISSION VII 
GVII-47 
Wilson, A. K., (1954), “Determination of Ponderosa Pine Volume and Site Quality Classes from 
Aerial Photographs.” Intermountain Forest and Range Experiment Station, U. S. Dept. 
Agric., Note 34. 
Wood, Kendall B., (1954), “Forest Engineering and Photo Interpretation,” Photogrammetric 
Engineering 20: 134. 
Wood, K. B., (1953), “Photo Interpretation in Forestry,” Photogrammetric Engineering, 19: 
477. 
Wood, K. B., (1954), “Forest Engineering and Photo Interpretation,” Photogrammetric En 
gineering, 20:134. 
Wood, K. B., (1954), “Use of Aerial Surveys in Forest Management,” Jour. Forestry, 52: 734. 
Worley, David P. and Meyer, H. A., (1955), “Measurements of Crown Diameter and Crown 
Cover and Their Accuracy for 1:12,000 Photographs, Photogrammetric Engineering, 21: 
373. 
Worley, David P. and Landis, Glenn H., (1954), “The Accuracy of Height Measurements with 
Parallax Instruments on 1:12,000 Photographs,” Photogrammetric Engineering, 20: 
823. 
Wright, Ernest and Graham, D. P., (1952), “Surveying for Pole Blight,” Jour. Forestry, 50: 680. 
Young, H. E. and Wing, L. A., (1953), “Use of Air Photos for Location of Truck Roads and Road 
Building Material in Maine,” Forestry Dept., University Maine, Tech. Note 20. 
Young, H. E., (1953), “Tree Counts on Air Photos in Maine,” Photogrammetric Engineering, 
19: 111. 
Young, H. E. and Getchell, Willis A., 1953, “Length of Time Necessary to Attain Proficiency with 
Height Finders on Air Photos,” Forestry Dept., University Maine, Tech. Note 23. 
Young, H. E., (1954), “Photogrammetric Determination of Huge Pulpwood Piles,” Photogram 
metric Engineering, 20: 808. 
Young, H. E. and Tryor, T. C., (1954), “Dot Gridding by Air Photos,” Forestry Dept., University 
Maine, Tech. Note 31. 
Young, H. E., (1955), “Supplement to Photo Volume Determination of Huge Pulpwood Piles,” 
Photogrammetric Engineering, 21: 146. 
Young, H. E., (1955), “The Need for Quantitative Evaluation of the Photo Interpretation Sys 
tem,” Photogrammetric Engineering, 21: 712. 
Young, H. E., Tryon, T. C. and Hale, G. A., (1955), “Dot Gridding Air Photos and Maps,” 
Photogrammetric Engineering, 21: 737. 
Yuan, H. C., (1955), “Forest Photo Interpretation on Taiwan,” Photogrammetry Notes, Taiwan. 
Zahu-ud-Din, A. S. M., (1954), “Aerial Survey of Chittagong Hill Tracts Forests,” Pakistan Jour 
nal of Forestry, 4. 
ENGINEERING APPLICATIONS 
Photographic Interpretation in the Mapping Process 
During the reporting period, there has been a consistent increase in the ex 
tent to which photographic interpretation has been applied to large-scale 
mapping problems. This has been accomplished generally in two ways. First, 
there has been a tendency on the part of the mapping agencies to acquire or 
train personnel who can perform a certain amount of photographic interpreta 
tion and who can also operate photogrammetric equipment in the plotting proc 
ess. Second, many mapping agencies and commercial concerns have estab 
lished units of experienced photographic interpretation personnel within their 
organizations. 
In England differences of opinion still exist as to the administrative arrange 
ments to be made for photographic interpretation within survey organizations. 
Most government bodies and one commercial survey company hold the view 
that interpretation can be carried out during the process of plotting planimetrie 
detail when dealing with medium and small-scale work. One commercial firm 
on the other hand has established a separate section to carry out certain inter 
pretation processes before the actual plotting is commenced. At present the 
section is interpreting topographical detail, and in particular water courses and 
vegetation boundaries, by means of hand stereoscopes and contact prints, the 
marked-up detail being then adjusted by means of pantographs to the Multi-