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Schmidt, H. and Karnieli, A. 2001. Sensitivity of vegetation indices to substrate brightness in hyper-arid environment: the Makhtesh Ramon Crater (Israel) case study. International Journal of Remote Sensing, 22(17): 3503-3520


Description:

Sensitivity of vegetation indices to substrate brightness in hyper-arid environment: the Makhtesh Ramon Crater ( Israel ) case study.

Summary / Notes:

The influence of soil background on most vegetation indices (VIs) derived from remotely sensed imagery is a well known phenomenon, and has generated interest in the development of indices that would be less sensitive to this influence. Several such indices have been developed thus far. This paper focuses on testing and comparing the sensitivity of seven intensively used, Landsat Thematic Mapper (TM) derived, VIs (NDVI, SAVI, MSAVI, PVI, WDVI, SAVI 2 and TSAVI) to bare surface variation with almost no vegetation signal. The study was conducted on a terrain composed of a high variety of bare surface materials of which basalt and gypsum are two extremely dark and bright substrates respectively. It was found that SAVI and MSAVI respond to bare surface material very similarly. Such close similarity was also found between PVI and WDVI, and between SAVI 2 and TSAVI. NDVI tends to be overestimated on dark surfaces, while SAVI, PVI and TSAVI show more sensitivity to bright surfaces.

Year: 2001

Type: Journal Article

Origin: DRFN DLIB

URL: http://www.tandfonline.com/doi/abs/10.1080/01431160110063779


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