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

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A B<br />

C<br />

Figure 36. A and B are <strong>the</strong> results from <strong>the</strong> initial f110512t01p00r07 data set overlain<br />

on a gray scale image and in <strong>the</strong> MF verses infeasibility class scatterplot<br />

results, respectively. C shows a zoomed in portion of <strong>the</strong> creek area with red<br />

pixels representing <strong>the</strong> disturbed creek soil endmember in <strong>the</strong><br />

f110512t01p00r07 data set. Pixel percentages range from 9-37% with <strong>the</strong><br />

best matches falling between 9 and 16%.<br />

The repeatability test seemed <strong>to</strong> yield much more accurate results with <strong>the</strong> lower<br />

resolution image. The results were between 5 and 11 % which at first seems low, but<br />

remembering that <strong>the</strong> resolution is 15.2 m per pixel, even large features are expected <strong>to</strong><br />

occupy lower percentages of pixels. Red pixel areas correspond <strong>to</strong> what appeared <strong>to</strong> be<br />

creek drainages with potential oxbow lakes (Figure 37, inset A and C), but upon looking<br />

at Google Earth <strong>for</strong> virtual ground-truthing, most of <strong>the</strong>se pixels are associated with ATV<br />

trails within <strong>the</strong> drainages (Figure 37, inset B). This is a very good result as <strong>the</strong><br />

endmember was collected from ATV trails along creek drainages in Mazourka Canyon.<br />

71

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