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gvSIG-Desktop 1.1. Manual de usuario.
Manual de usuario - Herramientas de Geoprocesamiento - Envolvente convexa - Creación de una 'Envolvente convexa' (Convex Hull)
If you select the “Convex hull” geoprocess, the following dialogue appears:
After selecting the layer whose “Convex Hull” you wish to calculate and specifying an shp result file, you can run the geoprocess and generate a new result layer.
The following image shows the convex hull created which surrounds all the points in the input layer.
