verification-classification, and delineation transfer to map sheets, for the 
completed areas was computed to cost an average of three to five cents per 
hectare. 
SUMMARY 
Due to its 18-day repetitive coverage, ERTS-1 imagery proves most 
valuable for monitoring important rangeland resources. Rangeland resources 
due to their dynamic nature, must be constantly evaluated in order that important 
decisions can be made rapidly and decisively. ERTS provides the tool whereby 
the range manager can quickly and accurately evaluate forage and water availability, 
quality, and source. These are some of the most important factors which govern 
livestock movements and allocations, and for the monitoring and evaluation of 
wildlife habitats. Along with ERTS imagery, manual interpretation of high 
resolution color infrared aerial photography (1:30,000 scale) proves to be an 
accurate, cost effective means for producing resource maps (vegetation, sensi 
tive areas, broad soil groups) of large tracts of land under multiple use 
management. In large regions where limited information exists on the soil 
resource, land system mapping and classification using satellite imagery, aerial 
photography, and systematically collected ground data has proven to be an 
effective means of acquiring information necessary for current management 
objectives or as an initial input for more detailed investigations should the 
intensity of management increase within the region being mapped. 
REFERENCES 
Anderson, J.R., E.E. Hardy, and J.T. Roach 
1973: A Land-Use Classification System for Use with Remote Sensor 
'Data. U.S. Geological Survey Circular //6 71, 16pp. 
Driscol, R.S. 
1964: Vegetation-Soil Units in the Central Oregon Juniper Zone. 
U.S. Forest Service Res. Paper PNW-19, 60pp., illus. 
MacDonald G.A. 
1966: Geology of the Cascade Range and Modoc Plateau. In "Geology of 
Northern California", E.H. Bailey, Ed., Ca. Div. Mines and Geology, 
Bulletin 190, 507pp.