Hamilton, David A, Jr. 

 1980. Large-scale color aerial photography as a tool in sampling 

 for mortality rates. USDA For. Serv. Res. Pap. INT-269, 8 p. 

 Intermt. For. and Range Exp. Stn., Ogden, Utah 84401. 



Mortality rates specify the proportion of trees with a given set of 

 characteristics that are expected to die in a fixed time interval. 

 Results indicatethat 1 -year mortality trees can be dated and species 

 can be assigned to green trees and to 1-year mortality trees with 

 acceptable accuracy on 70 mm color photography at scales of 

 1 :1 600 and 1 :2400. Attempts to date 2-year mortality trees on either 

 scale photography were unsuccessful. 



KEYWORDS: Mortality inventory, 70 mm aerial photography, mor- 

 tality rate 



Hamilton, David A., Jr. 

 1980. Large-scale color aerial photography as a tool in sampling 

 for mortality rates. USDA For. Serv. Res. Pap. INT-269, 8 p. 

 Intermt. For. and Range Exp. Stn., Ogden, Utah 84401. 



Mortality rates specify the proportion of trees with a given set of 

 characteristics that are expected to die in a fixed time interval. 

 Results indicatethat 1 -year mortality trees can be dated and species 

 can be assigned to green trees and to 1-year mortality trees with 

 acceptable accuracy on 70 mm color photography at scales of 

 1 :1 600 and 1 :2400. Attempts to date 2-year mortality trees on either 

 scale photography were unsuccessful. 



KEYWORDS: Mortality inventory, 70 mm aerial photography, mor- 

 tality rate 



U S GOVERNMENT PRINTING OFFICE 1981 - 778-276/M9460 Region No 8 



