GIS Development Pvt. Ltd.. GIS Development: The Geospatial Resource Portal [online]. Available from: http://www.gisdevelopment.net/ [Accessed 2005-01-21]. Good starting point to look for terms, definitions, data, tools and other resources...
Peterson M.P.. Geographic Information Systems [online]. Available from: http://maps.unomaha.edu/Peterson/gis/ [Accessed 2005-01-21]. Course materials and more from Dr. M.P. Peterson at Edinburgh University