What is a GIS?

" a decision support system involving the integration of spatially referenced data in a problem solving environment." (Cowen, 1988).

" any manual or computer based set of procedures used to store and manipulate geographically referenced data." (Aronoff, 1989).

" an institutional entity, reflecting an organisational structure that integrates technology with a database, expertise and continuing financial support over time." (Carter, 1989).