Karst rocky desertification information extraction with EO-1 Hyperion data

Yuemin Yue; Kelin Wang; Bing Zhang; Quanjun Jiao; Yizun Yu

doi:10.1117/12.815765

29 December 2008 Karst rocky desertification information extraction with EO-1 Hyperion data

Yuemin Yue, Kelin Wang, Bing Zhang, Quanjun Jiao, Yizun Yu

Proceedings Volume 7285, International Conference on Earth Observation Data Processing and Analysis (ICEODPA); 72854A (2008) https://doi.org/10.1117/12.815765
Event: International Conference on Earth Observation Data Processing and Analysis, 2008, Wuhan, China

Abstract

Karst rocky desertification is a special kind of land desertification developed under violent human impacts on the vulnerable eco-geo-environment of karst ecosystem. The process of karst rocky desertification results in simultaneous and complex variations of many interrelated soil, rock and vegetation biogeophysical parameters, rendering it difficult to develop simple and robust remote sensing mapping and monitoring approaches. In this study, we aimed to use Earth Observing 1 (EO-1) Hyperion hyperspectral data to extract the karst rocky desertification information. A spectral unmixing model based on Monte Carlo approach, was employed to quantify the fractional cover of photosynthetic vegetation (PV), non-photosynthetic vegetation (NPV) and bare substrates. The results showed that SWIR (1.9-2.35μm) portions of the spectrum were significantly different in PV, NPV and bare rock spectral properties. It has limitations in using full optical range or only SWIR (1.9-2.35μm) region of Hyperion to decompose image into PV, NPV and bare substrates covers. However, when use the tied-SWIR, the sub-pixel fractional covers of PV, NPV and bare substrates were accurately estimated. Our study indicates that the "tied-spectrum" method effectively accentuate the spectral characteristics of materials, while the spectral unmixing model based on Monte Carlo approach is a useful tool to automatically extract mixed ground objects in karst ecosystem. Karst rocky desertification information can be accurately extracted with EO-1 Hyperion. Imaging spectroscopy can provide a powerful methodology toward understanding the extent and spatial pattern of land degradation in karst ecosystem.

Citation Download Citation

Yuemin Yue, Kelin Wang, Bing Zhang, Quanjun Jiao, and Yizun Yu "Karst rocky desertification information extraction with EO-1 Hyperion data", Proc. SPIE 7285, International Conference on Earth Observation Data Processing and Analysis (ICEODPA), 72854A (29 December 2008); https://doi.org/10.1117/12.815765

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