THE AUTHORS 



DWANE D. VAN HOOSER is Project Leader, Forest 

 Survey. Intermountain Forest and Range Experiment 

 Station. He holds a B.S. degree in forestry and an M.S. 

 in forestry and business nnanagement from Southern 

 Illinois University. Carbondale. He began his Forest 

 Service career in 1964 v^/ith the Southern Forest 

 Experiment Station, New Orleans. Before coming to 

 Ogden, he held a staff position at the Forest Service 

 national headquarters in Washington, D.C. 



DAVID C. CHOJNACKY is research forester, Forest 

 Survey, Intermountain Forest and Range Experiment 

 Station. He holds a B.S. degree in mathematics from 

 the University of Idaho, Moscow, and an M.S. in water- 

 shed management from the University of Arizona, 

 Tucson. He has been with the Forest Service since 

 May 1979. 



RESEARCH SUMMARY 



The impact of measuring trees at 1.3 m versus 

 1.37 m heights above ground line was analyzed. The 

 results indicate that the difference in diameter 

 measurement taken at the two points averages around 

 1 percent. An equation for converting from English 

 diameter at breast height to the metric equivalent of 

 1.3 m is presented. 



