A study of vulnerability to fasciolosis was conducted in the experimental area of the Instituto Federal de Ciência e Tecnologia do Espírito Santo - Campus Alegre, Espírito Santo, Brazil. The Geographic Information System was used to build a digital elevation model based on the best interpolator for the study area. From the analysis of the best interpolation, the matrix slope image was generated which was reclassified in order to discriminate only the range representative of the matrix class of: a) flat terrain of the study area (0-4%), converted to vector polygon format. On the composition of normal color and false-color imaging of the Geoeye satellite with 50 cm resolution, photointerpreting was used to establish the vector polygon classes of: b) floodplain, c) water bodies and d) pasture. The (straight line) distance function and linear patterning function (fuzzy function) were applied on these 4 vector polygon images. After the allocation of the statistical weights of each vector polygon class, the raster calculator function was used to generate the statistical mathematical model: vulnerability of the environmental action to fasciolosis. The Topo to Raster interpolation was the most appropriate digital elevation model. The slope map made it possible to show that the collection areas studied are located in places with low rates of slope. Percentages of 25 and 31% were found in areas of highest/high risk and medium-high risk respectively.
Fasciola hepatica; GIS; vulnerability maps