Land cover changes resulting from urban sprawl, transport network intensification and agricultural changes contribute to fragment wildlife habitats and may lead to question viability of animal and vegetal populations. Including issues of ecological networks and landscape connectivity in spatial planning and land management proves therefore to be a crucial stake for preserving biodiversity. In this context, the modelling of ecological networks is a suitable approach for achieving diagnoses, prioritizing action to be done (for instance ecological restoration) and comparing prospective scenarios of development or conservation. This kind of modelling is complementary to approaches led by field specialists in ecology.

Graphab software is devoted to the modelling of ecological networks from the framework of graph theory. It is the only tool able to include construction and visualization of graphs, connectivity analyses and links with external data. It is easily compatible with Geographical Information Systems.

Graphab is composed of 4 modules


Constructing graphs


Computing metrics


Analysis et generalization


Visual and cartographic interfacing

Identification of habitat patches and links

Computation of connectivity metrics

Species distribution models and connectivity metric interpolation

Visual and cartographic interfacing


Graphab runs on any computer supporting Java (PC under Linux, Windows, Mac...). It is distributed free of charge.

Graphab is open source and distributed under GPL licence, with the only condition of citing the software :

Foltête J.C., Clauzel C., Vuidel G., 2012. A software tool dedicated to the modelling of landscape networks Environmental Modelling & Software, 38: 316-327.






F.A.Q. & Forum

Who are we?

Jean-Christophe Foltête

Jean-Christophe Foltête, Professor of geography
ThéMA Lab, University of Bourgogne-Franche-Comté

Gilles Vuidel

Gilles Vuidel, CNRS Senior Research Officer
ThéMA Lab

Céline Clauzel

Céline Clauzel, Associate Professor
LADYSS, University Paris Diderot

Xavier Girardet

Xavier Girardet, Associate Professor
ThéMA Lab, University of Bourgogne-Franche-Comté

Marc Bourgeois

Marc Bourgeois, Associate Professor
EVS Lab, University Lyon 3 Jean Moulin

Yohan Sahraoui

Yohan Sahraoui, Post-Doc
Chaire ETI - Labex COTE, University of Bordeaux