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Proceedings Paper

Study on the automatic extraction of water body from TM image using decision tree algorithm
Author(s): June Fu; Jizhou Wang; Jiren Li
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Paper Abstract

Landsat TM is the unique resource for global change research and applications in agriculture, geology, forestry, regional planning and so on. As the development of remote sensing applications, various water body extraction methods have been researched upon and developed in TM data. But there still are some limitations in the extracting water bodies which are partly confused with some residential districts. This paper concentrates on extracting water bodies by using decision tree classifiers based on TM images. Firstly, the formula TM2+TM3>TM4+TM5 was used to extract reservoirs, ponds and broad rivers. Then according to the mechanism and spectral characteristics of water body and other objects in TM data, the structure of the decision tree and the locations for each notes in the tree are determined. Finally, based on the model established using ENVI software, water area is extracted automatically, and the yield images are checked by visual and statistical accuracy assessment. The results show the application of decision tree is simple and could improve the accuracy of water body extraction. The decision tree, however, missed small water bodies at scales below the sensor resolution.

Paper Details

Date Published: 19 February 2008
PDF: 9 pages
Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 662502 (19 February 2008); doi: 10.1117/12.790602
Show Author Affiliations
June Fu, China Institute of Water Resources and Hydropower Research (China)
Jizhou Wang, Chinese Academy of Surveying and Mapping (China)
Jiren Li, China Institute of Water Resources and Hydropower Research (China)


Published in SPIE Proceedings Vol. 6625:
International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications

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