Sampling Vegetation Attributes - Natural Resources Conservation ...

METHODS—Photographs
camera, film, and local knowledge of photo point location; given these, they are
easy to set up and retake. Agencies can encourage participation by external groups
or permittees by providing the photographer with film and development. Double
prints allow the agency and photographer to keep copies of photographs for their
files. Negatives should generally be kept and filed at the agency office.
7. Video Images Video cameras, i.e., camcorders, are now available and are able to
record multiple images of landscapes for monitoring. While video images provide
new ways to record landscape images, limitations in their use should also be
considered. Video tapes, especially the quality of the image, may begin to deteriorate
within 5 years. These images can be protected by conversion to digital computer
images (expensive) or rerecording the original tape onto a new blank tape.
Comparing repeat video images is difficult, especially if the same landscape sequences
are not repeated in the same way on subsequent video recordings. Video
cameras are also more susceptible to dust and heat damage and cost considerably
more than 35-mm cameras. Advantages and disadvantages of video cameras
should be carefully considered prior to implementing a video monitoring system.
8. Repeat Pictures When repeat pictures are taken, follow the same process used
in taking the initial pictures. Include the same area and landmarks in the repeat
general view pictures that were included in the initial pictures. Take repeat pictures
at approximately the same time of year as the original pictures.
9. General Observations General observations concerning the sites on which
photographs are taken can be important in interpreting the photos. Such factors as
rodent use, insect infestation, animal concentration, fire, vandalism, and other site
uses can have considerable impact on vegetation and soil resources. This information
can be recorded on note paper or on study method forms themselves if the
photographs are taken while collecting other monitoring data.
10. References
USDI, Bureau of Land Management. 1985. Rangeland monitoring - Trend
studies TR4400-4.
USDA, Forest Service. 1994. Rangeland Analysis and Management Training
Guide, Rocky Mountain Region USDA Forest Service Denver, CO.
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