气候变化领域集成服务门户(CCPortal): Assessment of the 1.75 μm absorption feature for gypsum estimation using laboratory, air- and spaceborne hyperspectral sensors

CCPortal

DOI	10.1016/j.jag.2018.12.012
	Assessment of the 1.75 μm absorption feature for gypsum estimation using laboratory, air- and spaceborne hyperspectral sensors
	Milewski R.; Chabrillat S.; Brell M.; Schleicher A.M.; Guanter L.
发表日期	2019
ISSN	15698432
起始页码	69
结束页码	83
卷号	77
英文摘要	High spectral resolution (hyperspectral) remote sensing has already demonstrated its capabilities for soil constituent mapping based on absorption feature parameters. This paper tests different parametrizations of the 1.75 μm gypsum feature for the determination of gypsum abundances, from the laboratory to remote sensing applications of recent as well as upcoming hyperspectral sensors. In particular, this study focuses on remote sensing imagery over the large body of the Omongwa pan located in the Namibian Kalahari. Four common absorption feature parameters are compared: band ratio through the introduction of the Normalized Differenced Gypsum Index (NDGI), the shape-based parameters Slope, and Half-Area, and the Continuum Removed Absorption Depth (CRAD). On laboratory soil samples from the pan, CRAD and NDGI approaches perform best to determine gypsum content tested in cross validated regression models with XRD mineralogical data (R² = 0.84 for NDGI and R² = 0.86 for CRAD). Subsequently the laboratory prediction functions are transferred to remote sensing imagery of spaceborne Hyperion, airborne HySpex and simulated spaceborne EnMAP sensor. Variable results were obtained depending on sensor characteristics, data quality, preprocessing and spectral parameters. Overall, the CRAD parameter in this wavelength region proved not to be robust for remote sensing applications, and the simple band ratio based parameter, the NDGI, proved robust and is recommended for future use for the determination of gypsum content in bare soils based on remote sensing hyperspectral imagery. © 2018 Elsevier B.V.
英文关键词	Absorption feature parameters; Gypsum quantification; Hyperspectral; Namibia; Salt pan
语种	英语
scopus关键词	absorption; gypsum; imagery; laboratory method; parameterization; quantitative analysis; remote sensing; salt pan; sensor; soil chemistry; spectral analysis; Namibia
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156496
作者单位	Helmholtz Center Potsdam, GFZ German Research Center for Geosciences, Section 1.3 Remote Sensing, Telegrafenberg A17, Potsdam, 14473, Germany; Helmholtz Center Potsdam, GFZ German Research Center for Geosciences, Section 3.1 Inorganic and Isotope Geochchemistry, Telegrafenberg A17, Potsdam, 14473, Germany
推荐引用方式 GB/T 7714	Milewski R.,Chabrillat S.,Brell M.,等. Assessment of the 1.75 μm absorption feature for gypsum estimation using laboratory, air- and spaceborne hyperspectral sensors[J],2019,77.
APA	Milewski R.,Chabrillat S.,Brell M.,Schleicher A.M.,&Guanter L..(2019).Assessment of the 1.75 μm absorption feature for gypsum estimation using laboratory, air- and spaceborne hyperspectral sensors.International Journal of Applied Earth Observation and Geoinformation,77.
MLA	Milewski R.,et al."Assessment of the 1.75 μm absorption feature for gypsum estimation using laboratory, air- and spaceborne hyperspectral sensors".International Journal of Applied Earth Observation and Geoinformation 77(2019).