1. Presented to the Sully District Council of Civic Association
Fairfax County GIS
Presented to the Sully District Council of Civic Association

2. What Is A GIS?
A computer-based tool for mapping and analyzing spatial information
Integrates common database operations such as query and statistical analysis with maps

3. How GIS works Links records in a database to features on the map
Features are represented as Points, Lines, & Polygons
Data is linked to features on the map
Logical query
Where are the fire stations
Public facilites are points
Polys
Lines

4. Paper to Digital Maps County maps were converted to digital layers
Attribute database are attached to the features
Modify graphic to show manual products on left side and digital products on the right

5. County GIS User Agencies
Planning and Zoning
Mapping Services
Transportation
Public Schools
Health
Human Services
Police
Fire and Rescue
Tax Administration
Public Works
Management & Budget
Park Authority
Environmental Management
Juvenile Courts
Libraries

6. Current Geographic Data
Raster Parcel & Zoning
Orthophotography
Airports
Census Boundaries
Election Boundaries
Fire & Rescue Boundaries
Hydrography
Industrial Park Zoning Boundaries
Park Areas
Radon Gas
Police Patrol Boundaries
Political Jurisdictions
Public Facilities Locations
Railroads
Refuse Collection Areas
School Boundaries
School Locations
Planning Districts
1”=200’ Soils
Solid Waste Facilities
Street Centerline Network
Streets
Supervisor Districts
Tax Map Grid
Utility Lines
Watershed Areas
Zip Code Areas 13 13 13 16 13 13 13

7. Soils and Parcel Map Images
DEM

8. Emphasize the connection between tabular data is joined to features on the map.
Note % of County covered by park land

9. School Attendance Area Realignment
School planners, working with parents, can make better new school boundary decisions.
The GIS allows planners to recalulate the school age popluation of alternative boundaries automatically. Instead of manually summarizing..

10. DHS Child Care Provider Locations
This application will let parents find daycare providers near their home or job.
Make graphic Map only. Highlight in RED location

11. DOT Commuter Ridematcher
Allows County Transportation operators to geographically match commuters with each other through the WMCOG Ridematch database.

12. DTA BOE Maps
DTA Assessors use GIS to create maps for Board of Equalization cases showing the subject parcel and comparable properties.
Clearer graphic
DTA assessors use these maps to maintain fair and equitable assessments.

13. OCP Employer Statistics
Planners use GIS to thematically display multiple databases to analyze local employer job trends.

14. DHCD Conservation Area Study
Each parcel could be classified and displayed according to its housing condition.

15. Population Demographics
Budget analysts combined demographic data with GIS census track boundaries to produce population density maps.

17. 1”=200’ Data Conversion
Data conversion has started in the southeast corner and will move North and then West
10% of the planimetric tiles (building footprints and paved areas) have been delivered
75% of Orthophotography has been delivered
Expected completion: Spring 1999

18. Will be Completed Spring of 1999

19. Will be Completed Spring of 1999

20. Will be Completed Summer of 1999

21. Public Access to GIS Maps and Publications CDROM Data Distribution
1st floor of Government Center
GIS and Mapping Suite 117
CDROM Data Distribution
Single site license: $75.00
Arc/Info Coverage Format
All layers except Police and Soils
Copyrighted
County Internet Site