. Aerial photo techniques for a recreation inventory of mountain lakes and streams. National parks and reserves; Natural resources United States. Figure 4. --A typical live stream appears on panchromatic photography as a meandering, thin, dark line. RECOGNITION OF STREAMS ON AERIAL PHOTOS Larger streams, which are easily recognized on the photos, are usually correctly mapped. Many smaller streams, however, particularly in mountainous areas, cannot be identified from a map alone as flowing, dry, or intermittent. A number of these can be correctly classified from photos, and substantial savings
. Aerial photo techniques for a recreation inventory of mountain lakes and streams. National parks and reserves; Natural resources United States. Figure 4. --A typical live stream appears on panchromatic photography as a meandering, thin, dark line. RECOGNITION OF STREAMS ON AERIAL PHOTOS Larger streams, which are easily recognized on the photos, are usually correctly mapped. Many smaller streams, however, particularly in mountainous areas, cannot be identified from a map alone as flowing, dry, or intermittent. A number of these can be correctly classified from photos, and substantial savings over field inventory costs can be made. Where live streams are obscured by vegetation, their presence may sometimes be inferred from related photo features. A meandering pattern of dark blotches through a forested area may be made by marshes, springs, seeps, or other riparian vegetation and water. On the other hand, dary drainage channels usually appear on panchromatic photography in light-colored image tones, because the deposits of clay, silt, sand, and rock tend to reflect light. Such indirect evidence as exposed boulders, the absence of riparian vegetation, and lack of springs or marsh areas all suggest that a channel is dry. 13. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Herrington, Roscoe Burwell; Tocher, S. Ross (Stewart Ross); Intermountain Forest and Range Experiment Station (Ogden, Utah) 1n; Utah State University. College of Forest, Range, and Wildlife Management. Ogden, Utah : Intermountain Forest & Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, bookcollec, booksubjectnationalparksandreserves
