Forest change estimates for the Northern Petén region of Guatemala - 1986-1990
Landsat-thematic mapper images recorded April 1986 and 1990 were obtained for northern Guatemala. The study area corresponds to a major portion of Guatemala's Maya Biosphere reserve but also includes land outside the western and southern boundary of the reserve. The normalized difference vegetation index (NDVI) was computed at each date and image differencing (subtraction) was performed. The resulting image was thresholded into three categories: regrowth, no change, and forest clearing. A 10 x 10 km grid system was superimposed on the image to categorize the percentage of each 100 km2 cell that changed between 1986 and 1990. Forest clearing patterns were apparent along the border areas (Mexico and Guatemala) and all along the southern portion of the study area where human populations were moving toward the Maya Biosphere borders, along existing roads. Forest clearing was negligible or absent in the roadless areas.
| Main Authors: | , , , |
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| Format: | biblioteca |
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| Subjects: | CLAROS (BOSQUE), ESTIMACION, SENSORES REMOTOS, SISTEMAS DE INFORMACION GEOGRAFICA, TELEDETECCION, PETEN, GUATEMALA, |
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