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Mapping small-scale vegetation changes in MexicoThis research attempts to map small-scale vegetation changes in Mexico. Forty-eight weeks of coarse resolution Advanced Very High Resolution Radiometer Normalized Difference Vegetation Index (NDVI), a digitized climax vegetation map, land cover samples from space shuttle photographs and actual vegetation samples were used as inputs. Principal components analyses and a clustering algorithm were applied to the NDVI data to generate a single layer that was stratified by the climax vegetation zones map. The purpose is to create a new layer that differentiates climax vegetation (hypothesized potential vegetation) from non-climax vegetation land covers. One of the keys to developing a present-day vegetation map was differentiating intrazone land covers based on the stratification; as great as 75% of the sampled land cover types differed from the climax vegetation. The present-day vegetation map achieved 80% classification accuracy when calculated from available ground reference data. About 55% of the temperate zones and 37% of the tropical zones were found to contain original climax vegetation. Most changes coincide with areas of major agricultural activity.
Document ID
19950030438
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Turcotte, Kevin M.
(Ball State University Muncie, IN, United States)
Lulla, Kemlesh
(NASA Johnson Space Center Houston, TX, United States)
Venugopal, Gopalan
(Ball State University Muncie, IN, United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1993
Publication Information
Publication: Geocarto
Volume: 8
Issue: 4
ISSN: 1010-6049
Subject Category
Earth Resources And Remote Sensing
Accession Number
95A62037
Distribution Limits
Public
Copyright
Other

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