Detecting forest canopy change due to insect activity using Landsat MSS
1983; American Society for Photogrammetry and Remote Sensing; Volume: 49; Issue: 9 Linguagem: Inglês
ISSN
2374-8079
Autores Tópico(s)Forest ecology and management
ResumoMultitemporal Landsat multispectral scanner data were analyzed to test various computer-aided analysis techniques for detecting significant forest canopy alteration. Three data transformations - differencing, ratioing, and a vegetative index difference - were tested to determine which best delineated gypsy moth defoliation. Response surface analyses were conducted to determine optimal threshold levels for the individual transformed bands and band combinations. Results indicate that, of the three transformations investigated, a vegetative index difference (VID) transformation most accurately delineates forest canopy change. Band 5 (0.6 to 0.7 micron ratioed data did nearly as well. However, other single bands and band combinations did not improve upon the band 5 ratio and VID results.
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