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Geographic Information Systems is a technology that allows data to be stored, viewed, queried, and analyzed spatially. A Spatial Information System (SIS) is a tool that can be used in almost any industry to develop geographic knowledge on timely
issues. GIS is ultimately a decision support tool. For a better demonstration of what GIS can do use the links below.
ESRI White Paper on Geography Matters....
GIS.COM The Internet Guide to Geographic Information Systems
US Geological Survey – Great intro to GIS
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