WORKING GROUP 6 
LEIGHTY 
Fig. 7. Examples of some arctic polygonal patterns 
Is is true, much work needs to be done on each of these features as to their 
origin, composition, classification, significance, etc. However, detailed study of 
good quality airphotos will yield much engineering information toward de 
termining identity, physical characteristics, and determination of expected 
behavior when subjected to use. 
Conclusion 
A generalized technique has been given for obtaining useful engineering 
information from airphotos which is applicable in arctic areas by organizing 
important aspects of terrain. This technique, which is over-simplified here 
due to presentation limitations, has been used many times in gathering in 
formation necessary to successful solution of engineering problems concerned 
with arctic terrain.