Remote sensing and urban malaria: radar Envisat contribution for the determination of potential Anopheles breeding site in Antananarivo (Madagascar)
Fiche du document
23 avril 2007
- handle: 10670/1.0sichh
- halshs: halshs-02344456
info:eu-repo/semantics/OpenAccess
Mots-clés
Remote sensing Malaria vector control Satellite imagery Urban areas -bio]/Ecology, environment/HealthSujets proches
Ague Chills and fever Intermittent fever Malarial feverCiter ce document
F. Rakotomanana et al., « Remote sensing and urban malaria: radar Envisat contribution for the determination of potential Anopheles breeding site in Antananarivo (Madagascar) », HAL-SHS : géographie, ID : 10670/1.0sichh
Métriques
Partage / Export
Résumé
Most studies of anopheline mosquito larval ecology have been done in rural settings. However, latest data based on two cross-sectional surveys in Antananarivo, the capitol of Madagascar, shown low rate of malaria cases among febrile episodes but autochthonous malaria cases exist. Anopheles funestus constitutes the main vector of malaria in the highlands of Madagascar. This paper described the determination of their potential breeding site using remotely sensed data. A supervised classification by the classical method of maximum likelihood was used for enhanced thematic mapper image of Landsat 7. Overall accuracy of the classification was 86% and kappa index was 0.835. Determination of landscape change by subtraction of images acquired on January and July was carried out for the Advanced Synthetic Aperture Image Precision images of Envisat. Increased backscatter coefficient between the two periods made possible to raise ambiguity between rice fields and other vegetation. That may improve the determination of potential anopheles breeding sites.