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

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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). 68
A B C D Figure 35. A shows results using BSC endmember 2 derived from the imagery. B and C show areas suspected to contain BSCs using endmember 3 and the Mazourka Canyon disturbed BSCs in green. While B and C show similar results, the results of A were not repeatable with the collected BSC endmembers. D shows the results from the repeatability test using the same endmember as in C. In all cases, the range was between 9–11% for target material, with higher values of 15–30% associated with possible bare to nearly bare soil. 69
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NAVAL POSTGRADUATE SCHOOL MONTEREY,
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REPORT DOCUMENTATION PAGE Form Appr
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Approved for public release; distri
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ABSTRACT Desert areas cover approxi
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TABLE OF CONTENTS I. INTRODUCTION..
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LIST OF FIGURES Figure 1. The above
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spectrum by atmospheric effects. Re
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emoved function showing an absorpti
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LIST OF TABLES Table 1. This table
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LIST OF ACRONYMS AND ABBREVIATIONS
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I. INTRODUCTION A study published b
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II. THE PHYSICS BEHIND REMOTE SENSI
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sensitive a given sensor is to diff
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Figure 3. From Green et al. (1998),
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analyzing imagery spectra, it is mo
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After data have been converted to r
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Collins et al. (1997) was able to s
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These purposes include, but are not
Page 37 and 38: III. DESERT ECOSYSTEM CHARACTERISTI
Page 39 and 40: sagebrush of Utah, Montana, and the
Page 41 and 42: in desert regions include argids, o
Page 43 and 44: 2. Biological Soil Crusts (BSCs) Bi
Page 45 and 46: 2004), especially in cases where ma
Page 47 and 48: IV. STUDY SITES The focus area of t
Page 50 and 51: Figure 13. This figure illustrates
Page 52 and 53: Following the uplift that occurred
Page 54 and 55: the Mazourka Canyon OHV park betwee
Page 56 and 57: wavelengths being analyzed to obtai
Page 58 and 59: 2. Field Spectroscopy An Analytical
Page 60 and 61: A spectral library was then built a
Page 62 and 63: after atmospherically correcting th
Page 64 and 65: where: is the mean corrected and no
Page 66 and 67: also be seen in Figure 23. The leve
Page 68 and 69: Figure 24. This figure is a compari
Page 70 and 71: Figure 25. This figure shows ASD co
Page 72 and 73: Looking at Figure 25 it is apparent
Page 74 and 75: A. IMAGERY DERIVED ENDMEMBERS The i
Page 76 and 77: Figure 28. The above shows some of
Page 78 and 79: spectrometer, reflectance values we
Page 80 and 81: such an inference can be made (Ben-
Page 82 and 83: While this is lower than the hoped
Page 84 and 85: While the lower value would initial
Page 86 and 87: Figure 33. This figure shows the ad
Page 90 and 91: However, the presences of BSCs are
Page 92 and 93: A B C Figure 37. Inset A shows the
Page 94 and 95: A B C Figure 38. Inset A shows a co
Page 96 and 97: differences in the studies by other
Page 98 and 99: small concentrations making them un
Page 100 and 101: area making it possible to tell wha
Page 102 and 103: Clark, R. N., Swayze, G. A., Livo,
Page 104 and 105: Kruse, F. A., Boardman, J. W., and
Page 106 and 107: Sharp, R. P., and Glazner, A. F., (
Page 108: INITIAL DISTRIBUTION LIST 1. Defens
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