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Proceedings Paper

Quantitative evaluation of desertification extent based on geographic unit by remote sensing image
Author(s): Zhoulong Wang; Dapeng Wang; Chunlai Zhang; Anding Zhang
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Paper Abstract

The quantitative evaluation of desertification extent with remotely sensed imagery has been a hot spot of remote sensing application research. The evaluation process should consider the principles of dominance, integration and so on. Traditional evaluation methods to desertification extent are usually carried out at the scale of discrete pixels, which fails to taken into account of the influence of adjacent pixels and results in noises on the evaluation result images, inducing the unilateralism result. If we try to use filters to reduce the noises, then the evaluation results will be wrong contrasting with its real result. Based on former researches and the geographic science principle, this paper discusses the method of assessing desertification extent at the scale of geographic unit, in which the geographic unit is determined by vegetation coverage index and spatial information. The test results show that this method provides more accurate assessment of the ground situation avoiding the limitations of traditional methods.

Paper Details

Date Published: 26 July 2007
PDF: 8 pages
Proc. SPIE 6752, Geoinformatics 2007: Remotely Sensed Data and Information, 67521Y (26 July 2007); doi: 10.1117/12.760720
Show Author Affiliations
Zhoulong Wang, Ludong Univ. (China)
Dapeng Wang, Ludong Univ. (China)
Chunlai Zhang, Beijing Normal Univ. (China)
Anding Zhang, Ludong Univ. (China)


Published in SPIE Proceedings Vol. 6752:
Geoinformatics 2007: Remotely Sensed Data and Information

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