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Sep 2, 2009 - extinguishment and environment rebuilding. This paper studied the theoretical architecture of weights-of-evidence approach. The case study ...
Geo-spatial Information Science 12(3):217-224

Volume 12, Issue 3

DOI 10.1007/s11806-009-0079-2

September 2009

Article ID: 1009-5020(2009)03-217-08

Document code: A

Using Weights of Evidence in the Spatial Relation Between Infected Snails and Geographic Factors ZHAO An Abstract

BAO Shuming

GONG Peng

Schistosomiasis is a serious public health problem in the middle-lower Yangtze River Basin in China. Study of spa-

tial variation of snail distribution that is related to microgeographic factors can help to choose pertinent measures for snail extinguishment and environment rebuilding. This paper studied the theoretical architecture of weights-of-evidence approach. The case study was made for spatial relation between the occurrence of infected snails and geographic factor combinations in Waijiazhou marshland of Poyang Lake region in China. The multievidence data came from the geographical factor combinations by crossing operation of vegetation coverage grade layer, cattle route distance grade layer, and special environment layer (181 combinations in total) in GIS. The calculation of weight contrast index shows that high vegetation coverage, cattle route distance of

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