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

Inset C of Figure 35 is the same data set (f110512t01p00r07) utilized with the imagery
derived BSC endmembers in Figure 35, inset A and B. Inset D of Figure 35 is the
f110512t01p00r08 data set result using the same endmember as in inset C for a
repeatability test. While the healthy BSC result using the imagery derived endmember
(Figure 35, inset A) was not repeatable using any of the ASD collected BSC
endmembers, the disturbed BSC endmember results did appear to be replicable to the
imagery derived ones with 7–11% providing the best result range in the
f110512t01p00r07 data set. Similar results for the f110512t01p00r08 data set of 5–9%
yielding the best range for the disturbed BSC endmember were obtained.
Slightly different results are expected as the resolution of the two images is close
but not exact. Figure 35, inset D shows the result for the f110512t01p00r08 data set.
BSC results are, however, somewhat inconclusive as they appear in high concentrations
in areas that other endmembers have also been detected, particularly the adjacent to tread
endmember. The distribution of the BSC pixels did look slightly different, and there is
no reason they could not occur in the same location, as BSCs tend to also cause soil to
become more consolidated via their growth method and are known to be a stabilizing
mechanism of slope material (Johnston, 1997).
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