What is GIS?
Firstly and most importantly a GIS is an information system.
A system is a group of connected entities and activities which interact for a common purpose. In GIS the common purpose is decision making for managing any spatially distributed activity.
•An information system is a set of processes, executed on raw data to produce information which will be useful in decision making
•A chain of steps leads from observation and collection of data through to analysis
•An information system must have a full range of tools to handle observation, measurement, description, explanation, forecasting and decision making
Finally it is important to remember that GIS can also help to achieve the overall objective of improving the decision making process, whether in an organisation, or within a project.