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Volume 19 Issue 4
Aug 2008
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Article Contents
Sheng-yuan ZHANG, Qiu-ming CHENG, Zhi-jun CHEN. Omnibus Weights of Evidence Method Implemented in GeoDAS GIS for Information Extraction and Integration. Journal of Earth Science, 2008, 19(4): 404-409.
Citation: Sheng-yuan ZHANG, Qiu-ming CHENG, Zhi-jun CHEN. Omnibus Weights of Evidence Method Implemented in GeoDAS GIS for Information Extraction and Integration. Journal of Earth Science, 2008, 19(4): 404-409.

Omnibus Weights of Evidence Method Implemented in GeoDAS GIS for Information Extraction and Integration

Funds:

the National Natural Science Foundation of China 40638041

National Key Technology R & D Program 2006BAB01A01

Project of China Geological Survey 1212010633910

the National High Technology Research and Development Program of China 2006AA06Z115

the National High Technology Research and Development Program of China 2006AA06Z113

State Key Laboratory of Geological Processes and Mineral Resources GPMR2007-12

More Information
  • Corresponding author: ZHANG Sheng-yuan, zhangsh3002@126.com
  • Received Date: 30 Mar 2008
  • Accepted Date: 25 May 2008
  • Weights of evidence (WofE) is an artificial intelligent method for integration of information from diverse sources for predictive purpose in supporting decision making. This method has been commonly used to predict point events by integrating point training layer and binary or ternary evidential layers (multiclass evidence less commonly used). Omnibus weights of evidence integrates fuzzy training layer and diverse evidential layers. This method provides new features in comparison with the ordinary WofE method. This new method has been implemented in a geographic information system-geophysical data analysis system and the method includes the following contents: (1) dual fuzzy weights of evidence (DFWofE), in which training layer and evidential layers can be treated as fuzzy sets. DFWofE can be used to predict not only point events but also area or line events. In this model a fuzzy training layer can be defined based on point, line, and areas using fuzzy membership function; and (2) degree-of-exploration model for WofE is implemented through building a degree of exploration map. This method can be used to assess possible spatial correlations between the degree of exploration and potential evidential layers. Importantly, it would also make it possible to estimate undiscovered resources, if the degree of exploration map is combined with other models that predict where such resources are most likely to occur. These methods and relevant systems were validated using a case study of mineral potential prediction in Gejiu (个旧) mineral district, Yunnan (云南), China.

     

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