What is a GIS?

Geographic Information Systems is a system of computer software, hardware and data, and personnel to help manipulate analyze and present information that is tied to a spatial location.

information - visualization of analysis of data

spatial location - usually a geographic location

system - linking software, hardware, and data

personnel - a thinking explorer who is key to the power of GIS



A method to
visualize, manipulate, analyze, and display spatial data
“Smart Maps” linking a database to the map


What is Geography?

The 3 "W's" of Geography

What is where?

Why is it there?

Why do I care?    



There are two types of GIS data, Vector and Raster



                Vector                                                                                          Raster



Vector data can be illustrated as points, lines, and polygon




A point feature could be:


A line feature could be:

A polygon feature could be: