1. GIS Basic Training June 7, 2007 – ICIT Midyear Conference

2. What is GIS?
A collection of computer hardware, software and geographic data for capturing, storing, updating, manipulating, analyzing, and displaying all forms of geographically referenced information.
From Dictionary of GIS Terminology ESRI Press © 2001

3. GIS Components Hardware – Computers, Servers, and Network equipment
Software – The programs used to access the data
Information – visualization of analysis of data
System – linking software, hardware, and data
Personnel – people with knowledge of how to use the hardware, software, and data

4. Data, Data, Data Location Data How Many – What Kind - Where
Scale of Data
Local to Global
Data Presentation
Charts, Graphs, Tables, or Maps

5. What is NOT GIS? GPS – Global Positioning System
A static map – paper or digital
Maps are often a product of a GIS
A way to visualize the data or analysis
A software package

6. Real World vs. GIS
A method to visualize, manipulate, analyze, and display spatial data
“Smart Maps” linking a database to the map or the ability to ask the map questions and get back answers

7. Database
Not easy to interpret

8. Visualization
Easily worth a thousand words

9. Types of Data Raster – Grid Vector – Linear Real World “pixels”
a location and value
Satellite images and aerial photos are examples
Vector – Linear
Points, lines, & polygons
Features with attributes
Size, type, area, length
Real World

10. Common Raster Data Formats
TiFF
High Quality
No Compression
Slower
MrSiD
Good Quality
Some Compression
Faster
Geodatabase
Compression up to the Administrator
Fastest
More disk space

11. Vector Data Type - Points

12. Examples of Points Wells Addresses Stream gauges School Locations
Cemeteries

13. Vector Data Type - Line

14. Examples of Lines
Roads
Rivers
Contours
Parcel Lines
Railroads

15. Vector Data Type - Polygon

16. Examples of Polygons
States
Countries
Counties
Lakes
Precincts

17. Data Type vs. Scale Large scale, small area Small scale, large area
Cities as polygons
Roads as polygons
Rivers & Streams as polygons
Small scale, large area
Cities as points
Roads as lines
Rivers & Streams as lines

18. Data for GIS Applications
Digitized and Scanned Maps
Purchased or Free from Internet
Created by users
Databases
Tables of data
GPS – Global Positioning System
Provides accurate locations
Remote Sensing & Aerial Photography

19. Five Data Layers
Rivers
Cities
Roads
States
Lakes

20. Asking a Question - Interaction

21. Databases can be Linked and Related

22. Accessing GIS Data Local User GIS Server Worldwide Users Local User
Mobile User

23. Ways GIS is Used Emergency Services Environmental Business Government
Fire, Police, Dispatch
Environmental
Monitoring & Modeling
Business
Site Location & Transportation
Government
Local, State, Federal

24. Map Templates

25. Training Opportunities
ESRI
ICIT
GeoTree - UNI

26. Free GIS Data Iowa Geological Survey U.S. Census Bureau
U.S. Census Bureau
University of Northern Iowa
Iowa Geospatial Data Clearinghouse

27. Live Demo

28. Questions?

29. Jeff Miller, GIS Coordinator gis@dbqco.org (563) 589-7896
Contact Information
Jeff Miller, GIS Coordinator (563)

30. ArcCatalog

31. ArcMap

32. Select by Attributes Select by any Layer in your Map
Select the Field you wish to query
Then the value you wish to find

34. Select by Location Choose which layers you wish to select
Choose method of selection
Choose which layer you are selecting by

40. Geocode an Address Type the Address and Zone (Zip Code)
The software compares the address typed against the reference layer (roads) to find a match