title: [Preliminary study on applying high resolution CBERS images to identify Oncomelania snail habitats in lake and marshland regions].
abstract: OBJECTIVE
  To explore the preliminary application of high resolution CBERS-02B images in detecting the Oncomelania snail habitats in lake and marshland regions.
  
  
  METHODS
  The images with high resolutions were first fused from CBERS-02B HR and CCD images, and then the potential snail habitats in Xingzi County of Jiangxi Province were extracted from high resolution CBERS images and CCD images, respectively. A total of 2 000 validation points were randomly selected for comparing the difference of distribution of these points inside and outside of the extracted two snail habitats with the McNemar chi-square test.
  
  
  RESULTS
  The areas of the two snail habitats extracted from high resolution and CCD images were 98.23 km2 and 94.89 km2, respectively. The numbers of validation points in the two snail habitats were 255 and 248, respectively, and no significant difference was found (chi2 =177 9.52, P = 0.23).
  
  
  CONCLUSIONS
  At large-scale studies, the ranges and areas of the two snail habitats extracted from high resolution and CCD images are not significantly different.
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China.
authors.forename: Zeng-Liang
authors.initials: ZL
authors.lastname: Wang
authors.forename: Jie
authors.initials: J
authors.lastname: Gao
authors.forename: Bo
authors.initials: B
authors.lastname: Tao
authors.forename: Qiu-Lin
authors.initials: QL
authors.lastname: Jiang
authors.forename: Min-Ling
authors.initials: ML
authors.lastname: Zhai
authors.forename: Zhi-Jie
authors.initials: ZJ
authors.lastname: Zhang
authors.forename: Qing-Wu
authors.initials: QW
authors.lastname: Jiang
mesh_terms: D000818:Animals; D002681:China; D040362:Geographic Information Systems; D060106:Lakes / Q000469:parasitology*; D017215:Satellite Communications; D012908:Snails / Q000254:growth & development* / Q000469:parasitology; D053833:Wetlands