GreenRevolution
Gujarat, India
SatelliteImagery
Dams
Irrigation
Desertification
Figure 15
Scatter Plot of
Vegetation Change Results: NDVI vs. SMA
NDVI
Vegetation Change Results
-1.04 -0.63 -0.21 0.21 0.62
Spectral Mixture Modeling Vegetation Change Results
This
scatter plot shows the correspondence between vegetation change values as
calculated by NDVI vs. SMA. As the plot shows, most pixels fall along a best-fit
line showing overall good correlation between the two methods. However, there is
some spread and so some small discrepancies exist. The regularly scattered
pixels at the bottom are due to artifacts from the satellite sensor acquisition
that become apparent in some data over areas with extremely low DN values, such
as water, and therefore are not an indication of correlation problems between
the two methods for vegetation.