Interpretation of large-scale color infrared and color aerial photography can be a labor- and cost-effective means
to make inventory of and monitor rangelands while maintaining accuracy. Ground measurements of total
vegetation cover, tree, shrub and cacti cover at Organ Pipe Cactus National Monument were taken in 1975 and
1984. Estimates of ground vegetation cover made using large scale (1:1200) color and color infrared aerial
photography were compared to these ground measurements. High correlation coefficient values exist between
color infrared transparency estimates and ground measurements of total vegetation cover (r = 0.972) and shrub
cover (r = 0.891). Correlation coefficients were similarly high when matching color prints against ground
measurements of total cover (0-976) and shrub cover (0.858). Estimates from color infrared film transparencies
corresponded better with ground measurements for both tree and cactus cover, with r values of 0.685 and 0-812
respectively, than the estimates from color print photographs with r values of 0.501 for tree cover and 0.246 for
cactus cover.
source:abstract
and monitor arid rangeland vegetation. Journal of Environmental Management 31:29-38.
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