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Details van artikel 150 van 241 gevonden artikelen
| Titel: |
Mapping small-scale vegetation changes of Mexico |
| Auteur: |
Turcotte, Kevin M. Lulla, Kamlesh Venugopal, Gopalan |
| Verschenen in: |
Geocarto international |
| Paginering: | Jaargang 8 (1993) nr. 4 pagina's 73-85 |
| Jaar: |
1993-12 |
| Inhoud: |
This research attempts to map small-scale vegetation changes in Mexico. Forty-eight weeks of coarse resolution AVHRRNDVI, 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. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 150 van 241 gevonden artikelen
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