Publicação
Applying gully risk in the Fernão Dias environmental protection area, southeastern brazil, using FUZZY logic decision
| Resumo: | A spatial model is presented using logistic regression, fuzzy classification and GIS, to map the risk to the ravine. This model uses the maps: vegetation index, slope, and structural lineaments and roads density maps. The chance in favour of a gully event for these maps was estimated using odds ratio. The model calculates the risk of gully in each pixel, from the weighted sum of fuzzy maps, and uses r2 value obtained by frequency ravine points observed in each class of thematic maps as weight values. |
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| Autores principais: | Ferreira, Marcos César |
| Outros Autores: | Garófalo, Danilo Trovó; Ferreira, Marta Marujo |
| Assunto: | Clasificación difusa SIG mapa de riesgos barrancos regresión logística. Classificação fuzzy SIG mapa de riscos ravinas regressão logística. Classification diffuse SIG cartographie des risques ravines régression logistique. Fuzzy classification GIS risk map gullies logistic regression. |
| Ano: | 2015 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | unknown |
| Instituição associada: | Imprensa da Universidade de Coimbra |
| Idioma: | português |
| Origem: | Territorium |
| Resumo: | A spatial model is presented using logistic regression, fuzzy classification and GIS, to map the risk to the ravine. This model uses the maps: vegetation index, slope, and structural lineaments and roads density maps. The chance in favour of a gully event for these maps was estimated using odds ratio. The model calculates the risk of gully in each pixel, from the weighted sum of fuzzy maps, and uses r2 value obtained by frequency ravine points observed in each class of thematic maps as weight values. |
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