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gvSIG-Desktop 1.11. User manual

by Mario Carrera last modified 2013-07-30 16:04


Convex hull
Introduction

This geoprocess calculates the “Convex hull”, or the smallest convex polygon which surrounds all the vector elements in an “input layer”.

It only works with an “input layer” whose geometry type can be any type (point, line or polygon). There are different types of applications for this geoprocess: Determining the coverage area for a specific geographical phenomenon.

Calculating the diameter of the area covered by a series of geometries, etc.

envolvente-convexa-en.img/convexHullNuevoAcceso_en.png

Creating a convex hull

If you select the “Convex hull” geoprocess, the following dialogue appears:

envolvente-convexa-en.img/introduccionDatosConvexHull_en.png

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.

envolvente-convexa.img/puntosSeleccionadosConvex_es.png

The following image shows the convex hull created which surrounds all the points in the input layer.

envolvente-convexa.img/conveHullDePuntos_es.png

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