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Proceedings Paper

Land cover mapping and its validation for the northwest of China using SPOT Vegetation data
Author(s): Ling Lu; Xin Li; Qinghan Dong; Else Swinnen; Frank Veroustraete
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Paper Abstract

An accurate land cover mapping is a prerequisite to run all biospheric models. In this paper, NDVI (Normalized Difference Vegetation Index) and NDWI (Normalized Difference Water Index) time-series of data sets derived from 1-km SPOT/VEGETATION products were used to compile the land cover map of northwest China. The unsupervised classification technique of ISODATA was applied to classify the land cover classification system. With the assumption of the 1:100000 land use map of northwest China interpreted from TM images as the truth, the accuracy of the SPOT/VEGETATION land cover map was evaluated by validating 47 sampling units randomly selected in the whole mapping region. Each sample is a square unit of 25km´25km. The validation results showed an approving accuracy of the land cover map of northwest China. In addition, the combination of NDVI and NDWI vegetation indexes is an effective method on large regional land cover mapping. Meanwhile, three major problems are addressed for explaining the reasons that influence the accuracy of land cover mapping in this region

Paper Details

Date Published: 14 July 2003
PDF: 8 pages
Proc. SPIE 4890, Ecosystems Dynamics, Ecosystem-Society Interactions, and Remote Sensing Applications for Semi-Arid and Arid Land, (14 July 2003); doi: 10.1117/12.465710
Show Author Affiliations
Ling Lu, Cold and Arid Regions Environmental and Engineering Research Institute, CAS (China)
Xin Li, Cold and Arid Regions Environmental and Engineering Research Institute, CAS (China)
Qinghan Dong, VITO (Belgium)
Else Swinnen, VITO (Belgium)
Frank Veroustraete, VITO (Belgium)


Published in SPIE Proceedings Vol. 4890:
Ecosystems Dynamics, Ecosystem-Society Interactions, and Remote Sensing Applications for Semi-Arid and Arid Land
Xiaoling Pan; Wei Gao; Michael H. Glantz; Yoshiaki Honda, Editor(s)

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