Spectral Unmixing Applied to Desert Soils for the - Naval ...

ut there were a few that looked plausible. Endmembers 2, 3, and 32 (BSC 2, BSC 3,
and BSC 1 in Figure 34, respectively) seemed the most likely candidates when inspected
using the continuum removed method.
Figure 34. This figure is the spectra for three imagery derived mean class endmembers
thought to be BSCs and the spectrum for an endmember believed to be soil
based on criteria established previously from Weber et al (2008) and the
results of the spectral libraries with the continuum removed function
showing an absorption feature at ~650 nm not seen in soil (Figure 25).
The endmembers chosen for BSC candidates showed shallower absorption
features than vegetation endmembers that were slightly offset from the vegetation
absorption feature near 650–700 nm. Endmember 14 is thought to be bare soil, though
there may be a BSC or vegetation component there as well due to a slight absorption
feature also around 700 nm; though it is much shallower and a different shape. Once the
endmembers were determined they were scatter plotted as MF verses infeasibility to see
how they were distributed within the imagery and what MF scores would be associated
with the most likely matches. The result of this can be seen in Figure 35 A and B.
The collected endmembers from Mazourka Canyon were then scatter plotted in
the same image data set as the imagery derived ones and analyzed (Figure 35 C and D).
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