The quick overview of geographical information system (GIS) and ArcGIS I put together back in 2004.

1. Brief Introduction to GIS

2. 2
What is GIS?
• Geographical Information Systems
A method to visualize, manipulate,
analyze, and display spatial data

3. 3
Population Changes 1990-2000

4. 4
States which gained a seat (or two) after the 2000 census

5. 5
States which lost a House seat (or two) after the 2000 Census

6. 6
Reapportionment after the 2000 Census

7. 7
2000 Presidential vote by state

8. 8
1996

9. 9
1992

10. 10
Using ArcGIS

11. 11
Click on ArcCatalog (cabinet file-shaped icon) or Add Data (black cross
with yellow background) to import data.

12. 12
ArcCatalog (cabinet file-shaped icon) contains a lot of different kinds of
data. Additional data may be stored on the university’s GIS server.

13. 13

14. 14

15. 15
Changing layer orders 1) Counties

16. 16
Changing layer orders 2) Congressional Districts

17. 17
Changing layer orders 3) Census tract boundaries

18. 18
Displaying Data using “Symbology”

19. 19

20. 20

21. 21
Presidential Vote 2004 by County