Desertification Information Extraction Based on Feature Space Combinations on the Mongolian Plateau
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area
2.2. Data Sources and Preprocessing
2.3. Method
2.3.1. Principles of Feature Space
2.3.2. The Construction of Feature Space
2.3.3. Classification of Desertification
2.3.4. Accuracy Assessment and Comparison
3. Results
3.1. Quantitative Relationships among Feature Space Variables
3.2. Results and Comparison
3.3. Accuracy Assessment
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Feature Space Models | K |
---|---|
Albedo-NDVI | 0.55 |
Albedo-MSAVI | 0.38 |
Albedo-TGSI | −0.75 |
Model | Level | DDI |
---|---|---|
Albedo-NDVI | severe desertification | <−0.23 |
high desertification | −0.23 to −0.19 | |
medium desertification | −0.19 to −0.15 | |
low desertification | −0.15 to −0.05 | |
non-desertification | >−0.05 | |
Albedo-MSAVI | severe desertification | <−0.51 |
high desertification | −0.51 to −0.41 | |
medium desertification | −0.41 to −0.30 | |
low desertification | −0.30 to −0.14 | |
non-desertification | >−0.14 | |
Albedo-TGSI | severe desertification | <−1.10 |
high desertification | −1.10 to −0.94 | |
medium desertification | −0.94 to −0.78 | |
low desertification | −0.78 to −0.46 | |
non-desertification | >−0.46 |
Level | Albedo-NDVI | Albedo-MSAVI | Albedo-TGSI | |||
---|---|---|---|---|---|---|
Area (km2) | % | Area (km2) | % | Area (km2) | % | |
severe | 36,474.01 | 11.47 | 39,789.19 | 12.51 | 46,527.76 | 14.63 |
high | 75,588.28 | 23.78 | 72,539.47 | 22.82 | 88,625.83 | 27.87 |
medium | 101,489.64 | 31.92 | 97,466.09 | 30.66 | 93,847.18 | 29.52 |
low | 60,513.16 | 19.03 | 62,743.63 | 19.73 | 47,583.62 | 14.97 |
non | 7123.82 | 2.24 | 8203.43 | 2.58 | 4867.86 | 1.53 |
water | 11,544.11 | 3.63 | 11,983.89 | 3.77 | 11,300.88 | 3.55 |
sand | 25,224.58 | 7.93 | 25,231.90 | 7.93 | 25,204.47 | 7.93 |
total | 317,957.60 | 100 | 317,957.60 | 100 | 317,957.60 | 100 |
Model | Level | Severe | High | Medium | Low | Non | Water | Sand |
---|---|---|---|---|---|---|---|---|
Albedo-NDVI | severe | 27 | 6 | 0 | 0 | 0 | 0 | 3 |
high | 0 | 82 | 11 | 4 | 0 | 0 | 0 | |
medium | 0 | 4 | 102 | 11 | 0 | 0 | 0 | |
low | 0 | 0 | 6 | 43 | 2 | 0 | 0 | |
non | 0 | 0 | 2 | 3 | 13 | 1 | 0 | |
water | 0 | 0 | 0 | 0 | 2 | 17 | 0 | |
sand | 1 | 1 | 1 | 0 | 0 | 0 | 33 | |
Albedo-MSAVI | severe | 29 | 3 | 0 | 1 | 0 | 0 | 3 |
high | 2 | 81 | 10 | 4 | 0 | 0 | 0 | |
medium | 0 | 3 | 101 | 13 | 0 | 0 | 0 | |
low | 0 | 0 | 2 | 45 | 4 | 0 | 0 | |
lon | 0 | 0 | 1 | 2 | 15 | 1 | 0 | |
water | 0 | 0 | 0 | 0 | 1 | 18 | 0 | |
sand | 1 | 2 | 1 | 0 | 0 | 0 | 32 | |
Albedo-TGSI | severe | 32 | 1 | 0 | 0 | 0 | 0 | 3 |
high | 0 | 88 | 4 | 5 | 0 | 0 | 0 | |
medium | 0 | 6 | 106 | 5 | 0 | 0 | 0 | |
low | 1 | 0 | 8 | 41 | 1 | 0 | 0 | |
non | 0 | 0 | 2 | 2 | 14 | 1 | 0 | |
water | 0 | 0 | 0 | 1 | 1 | 17 | 0 | |
sand | 2 | 0 | 1 | 0 | 0 | 0 | 33 |
Model | Level | Producer Accuracy (%) | User Accuracy (%) |
---|---|---|---|
Albedo-NDVI | severe | 75.00 | 96.43 |
high | 84.54 | 88.17 | |
medium | 87.18 | 83.61 | |
low | 84.31 | 70.49 | |
non | 68.42 | 76.47 | |
water | 89.47 | 94.44 | |
sand | 91.67 | 91.67 | |
Albedo-MSAVI | severe | 80.56 | 90.63 |
high | 83.51 | 91.01 | |
medium | 86.32 | 87.83 | |
low | 88.24 | 69.23 | |
non | 78.95 | 75.00 | |
water | 94.74 | 94.74 | |
sand | 88.89 | 91.43 | |
Albedo-TGSI | severe | 88.89 | 91.43 |
high | 90.72 | 92.63 | |
medium | 90.6 | 87.6 | |
low | 80.39 | 75.93 | |
non | 73.68 | 87.5 | |
water | 89.47 | 94.44 | |
sand | 91.67 | 91.67 |
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Wei, H.; Wang, J.; Cheng, K.; Li, G.; Ochir, A.; Davaasuren, D.; Chonokhuu, S. Desertification Information Extraction Based on Feature Space Combinations on the Mongolian Plateau. Remote Sens. 2018, 10, 1614. https://doi.org/10.3390/rs10101614
Wei H, Wang J, Cheng K, Li G, Ochir A, Davaasuren D, Chonokhuu S. Desertification Information Extraction Based on Feature Space Combinations on the Mongolian Plateau. Remote Sensing. 2018; 10(10):1614. https://doi.org/10.3390/rs10101614
Chicago/Turabian StyleWei, Haishuo, Juanle Wang, Kai Cheng, Ge Li, Altansukh Ochir, Davaadorj Davaasuren, and Sonomdagva Chonokhuu. 2018. "Desertification Information Extraction Based on Feature Space Combinations on the Mongolian Plateau" Remote Sensing 10, no. 10: 1614. https://doi.org/10.3390/rs10101614