Projection-viewer for microscale aerial photography

Robert C. Aldrich; James von Mosch; Wallace Greentree

Treesearch

Projection-viewer for microscale aerial photography

Informally Refereed

Authors:

Robert C. Aldrich, James von Mosch, Wallace Greentree

Year:

1972

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-277. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

Download (PDF 556 KB)

Download (PDF 556 KB): https://research.fs.usda.gov/download/treesearch/30998.pdf

Abstract

A low-cost projection-viewer has been developed to enlarge portions of microscale aerial photographs. These pictures can be used for interpretation or mapping, or for comparison with existing photographs, maps, and overlays to monitor environmental changes. The projection-viewer can enlarge from 2.5 to 20 times, and can be calibrated so that maps may be drawn with a minimum of distortion.

Keywords

aerial photographs, forest surveys, photoprojectors

Citation

Aldrich, Robert C.; von Mosch, James; Greentree, Wallace. 1972. Projection-viewer for microscale aerial photography. Res. Note PSW-RN-277. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p