1. Department of Biology, Faculty of Science, Gulu University, Gulu, Uganda
2. Department of Geography, Geo-Informatics and Climatic Sciences, Makerere University, Kampala, Uganda
3. Centre for Geographic Information Systems, Lund University, Lund, Sweden
4. Faculté d’Agronomie et Environnement, Université Evangélique en Afrique, Bukavu- R, D. Congo