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Land Performance Analysis for the Sahel
An initial investigation
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PCA for Sahel- Integrated NDVI
Component 1
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Component 2
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1984 iNDVI 1995 iNDVI
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Deviation map 1984 (iNDVI84 - mean)
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PCA for Sahel- maximum NDVI
Component 1 Component 2
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Regression trends over the time (1982 -- 1999)
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A Series of Annual Local Variance Maps for iNDVI
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Local Variance - Sahel 1983 1984
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Local Variance 1988 1989
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Local Variance 1991 1995
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Local variance map 1996 1999
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Anomalies of local variance (threshold 12 out of 18 years)
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Intersection of local variance map & component 2
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(background is map of PCA component 2)
Geographic location for iNDVI time series plots 8 1 6 2 5 3 4 7 5 1 6 3 4 7 8 2 Red: negative sites Blue: positive sites (arbitrarily selected) (background is map of PCA component 2)
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PCA for Madagascar- Integrated NDVI
Component 1 Component 2
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PCA for Madagascar- maximum NDVI
Component 1 Component 2
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Regression trends over the time (1982 -- 1999)
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Anomalies of local variance (threshold 12 out of 18 years)
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