DETECTION OF OAK WILT WITH COLOR IR AERIAL PHOTOGRAPHY
During the period 1971-73, the following film/filter combinations at various scales were used to detect oak wilt infection centers in North Oaks, Minnesota; Ektachrome MS/Wratten 2A, Ektachrome IR/Wratten 15, and Ektrachrome IR/Wratten 21 at scales of 1:6,000, 1:12,000, 1:15,840, 1:24,000, and 1:31,680. Up to 100 percent detection of oak wilt infection centers was achieved with the 1:24,000 scale Ektachrome IR/Wratten 21 combination, although commission errors, i.e., calling dead trees or dead branches as oak wilt infection centers, remains a problem. The use of other combinations also proved relatively efficient and less costly than ground surveys alone. /Author/
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00991112
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Corporate Authors:
American Society of Photogrammetry
105 North Virginia Avenue
Falls Church, VA United States 22046 -
Authors:
- Ulliman, J J
- French, D W
- Publication Date: 1977-10
Media Info
- Features: References; Tables;
- Pagination: p. 1267-72
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Serial:
- Photogrammetric Engineering and Remote Sensing
- Volume: 43
- Issue Number: 10
- Publisher: American Society for Photogrammetry and Remote Sensing
- ISSN: 0099-1112
Subject/Index Terms
- TRT Terms: Aerial photography; Costs; Diseases and medical conditions; Filters; Surveys; Trees; Vegetation
- Subject Areas: Design; Finance; Highways; Safety and Human Factors;
Filing Info
- Accession Number: 00167903
- Record Type: Publication
- Files: TRIS
- Created Date: Feb 16 1978 12:00AM