Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Arthur W. Magill
    Date: 1989
    Source: Gen. Tech. Rep. PSW-GTR-117. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture; 55 p
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (4.7 MB)


    Monitoring human impact on outdoor recreation sites and view landscapes is necessary to evaluate influences which may require corrective action and to determine if management is achieving desired goals. An inexpensive method to monitor environmental change is to establish camera points and use repeat color slides. Successful monitoring from slides requires the observer to determine if there are increases or decreases of trees, shrubs, or herbaceous plants; bare ground or duff; screening by trees; and soil erosion. Illustrated guidelines are given for land managers who must monitor human impact on recreation sites and view landscapes. Slides taken at various intervals demonstrate how to detect differences in views of timber harvesting, disturbed sites, and recreation sites, and suggests what to look for in scenes with subjects viewed from various distances. By using the process, visual sensitivity for detecting and evaluating environmental change, using repeat color photog-raphy, should be increased.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Magill, Arthur W. 1989. Monitoring environmental change with color slides. Gen. Tech. Rep. PSW-GTR-117. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 55 p.


    Google Scholar


    color slides, environmental change, monitoring, outdoor recreation, repeat photography, visual sensitivity

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page