Color aerial photography : a new view for range management /

Shrubs such as antelope bitterbrush, big sagebrush, snowberry, and true mountainmahogany can be identified more consistently on large-scale (1:600-1:1,200) color infrared aerial photographs than on the same scale color aerial photographs.Identi- fication of relatively large forbs, including Fremont geranium and orange sneezeweed, is also easier on large scale color infrared.Neither film type appeared to give improved information regarding site delineation on smaller scale photographs.Other features of the range environment, including rodent disturbances, can best be identified on color infrared at photo scales up to 1:2,400.All of this depends on obtaining photographs at the right time of year in respect to phenology of the vegetation.