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Change in Vegetation: Nebaj & Acul, 1979-2000

A reliable method often used to quantify intense changes to a landscape is by comparing NDVI supervised classifications and their accompanying area summary reports. For the Nebaj & Acul region of the Ixil Triangle, three supervised class regions were designated to represent: “heavy vegetation” (heavily-wooded areas); “medium vegetation” (agriculture, mixed vegetation, and disbursed vegetation); and “light to no vegetation” (open ground, exposed soil, urban areas, roads, and perimeter vegetation) in the false colors representation red, salmon, and turquoise respectively. The results can be viewed in Figures 1, 2, and 3 and the accompanying area summary reports (Table 1).

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Figure 1.

 

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Figure 2.

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Figure 3.

 

Nebaj & Acul Region Summary Reports (Figures 1, 2 & 3)

Area Summary Report for 02/06/1979 MSS NDVI Classified

Class/Region Hectares Sq. Km Acres Sq. Miles
Heavy Vegetation 3520.127 35.201 8698.423 13.591
Medium Vegetation 2223.105 22.231 5493.413 8.583
Light to No Vegetation 236.738 2.367 584.992 0.914
All 5981.409 59.814 14780.385 23.094
         

Area Summary Report for 03/13/1986 MSS NDVI Classified
Class/Region Hectares Sq. Km Acres Sq. Miles
Heavy Vegetation 1984.002 19.840 4902.576 7.660
Medium Vegetation 2240.186 22.402 5535.619 8.649
Light to No Vegetation 1742.357 17.424 4305.459 6.727
All 5981.409 59.814 14780.385 23.094
 
Area Summary Report for 01/23/2000 MSS NDVI Classified
Class/Region Hectares Sq. Km Acres Sq. Miles
Heavy Vegetation 1758.440 17.584 4345.200 6.789
Medium Vegetation 2906.312 29.063 7181.653 11.221
Light to No Vegetation 1308.210 13.082 3232.657 5.051
All 5981.409 59.814 14780.385 23.094

Table 1.

 
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