GIS & Mapping


GIS and Mapping Basics

GIS stands for Geographic Information System. A GIS is a computer system - hardware and software - that helps analysts discover relationships between and among sets of geographically referenced data. 

GIS & Mapping Services is a branch of Fairfax County’s Department of Information Technology. It is tasked with developing, maintaining, coordinating, and distributing GIS/mapping data and technology to Fairfax County government agencies and residents.

FAQ's

Read through a list of frequently asked questions about GIS & Mapping concepts and branch activities. 

News

New Fairfax County Police Event Viewer is Now Available

A completely revised Police Event Viewer application now boasts a more modern design, quicker searches, and several exciting new features. With data from Fairfax County’s 9-1-1 call center, the Incident Viewer provides insight into police officers’ initial determination of what events occurred when responding to calls for service.

Available in standard and mobile versions, this mapping application facilitates custom police event searches. Users can choose an area of interest, date range and incident categories, and view the results on a map. Event details available include the date and time, a generalized location, and an event number that can be used in communications with the Fairfax County Police Department.

New Version of the Digital Map Viewer Application is Now Available

The Digital Map Viewer (DMV) is an online mapping application that aids users in viewing and downloading pages from official Fairfax County map books. Multiple types of map book pages are available, some with many years available (the property map book series goes back annually to 1960).

The new version of the (DMV) is a significant improvement and includes the following enhancements:

  • Search by Address
  • Open Maps in Tabs or New Windows
  • New Overview Map
  • Select Map Tile by Click
  • Save Previous Searches
  • Full Documentation

On-line Products and Services

Fairfax Geoportal

The Fairfax Geoportal provides streamlined access to the county's interactive mapping applications. A diversity of services, data and map functionality are accessible via the portal.

Virtual Fairfax

Fairfax County has recently launched a new 3-D web application that enables residents to view Fairfax County in a new way. With Virtual Fairfax, residents and the business community can view 3D buildings, terrain, aerial imagery, and take virtual tours. Using the mouse, it is possible to fly over properties from any angle, look at photorealistic 3D buildings from multiple perspectives, view shadows by time of day and year, and much more. Full documentation and FAQs are available on the application's site.

My Neighborhood

My Neighborhood is an Internet mapping and information reporting application. Its intended use is to let users know what features and facilities are available in and around their neighborhood. Through the My Neighborhood application, you can find information about parks, schools, libraries, fire stations, and other public facilities in your neighborhood.

Digital Map Viewer

The Digital Map Viewer is an online mapping application that aids users in viewing and downloading pages from official Fairfax County map books. Multiple types of map book pages are available, some with many years available (the property map book series goes back annually to 1960).

Maps may be found for a location by selecting the county tax map grid, entering an address, or clicking on the interactive map tab. Maps are downloaded in an Adobe PDF format and may be viewed online or downloaded for offline viewing. Using the Adobe Reader plugin, users can zoom, pan, turn map layers on and off, and print the map book pages.

Map Gallery

Find many common maps that are produced by the GIS & Mapping Services Branch. The maps are letter size and available in PDF format that may be downloaded or printed. The maps, include letter-sized countywide thematic maps, poster-sized individual Supervisor district maps, and published large format "wall maps." Maps produced from other agencies in Fairfax County may be found at the main County Maps page.

Police Event Viewer

The Police Incident Viewer is a mapping application that provides preliminary police investigation data from Fairfax County’s 9-1-1 call center. Available in standard and mobile versions, this mapping application facilitates custom police event searches. Users can choose an area of interest, date range and incident categories, and view the results on a map. Event details available include the date and time, a generalized location, and an event number that can be used in communications with the Fairfax County Police Department.

Planning & Zoning Viewer

The Planning Zoning Viewer is an interactive map, which provides information about current zoning applications and associated zoning layers for areas with in Fairfax County, Virginia. Map layers included are (present & future) Metrorail Stations lines, overlay districts, planning districts, planning sectors, planning areas, supervisor districts, parcels, common areas and zoning districts.

Zoning District Analyzer

The Fairfax County Zoning District Analyzer Map is an interactive map of existing zoning districts with in Fairfax County. This map enables the ability to toggle on/off each zoning district with in Fairfax County. The map can be viewed by clicking on the link or image above.

GIS Data Layers

Access over forty free downloadable GIS layers (ESRI shapefile format) for use in GIS and other mapping applications. The list of layers is the same as the wall map CD that is available for purchase.

Street Atlas Index

The "Fairfax County, VA Supplemental Street Index" is a listing of all streets located within Fairfax County, Virginia and the City of Fairfax. Each street name in the index includes the associated address ranges. Each address range includes the corresponding "Fairfax County, VA Street Atlas" map number and Fairfax County tax map grid number. Street information in this index is current to 2008.

DTA Parcel Finder

Find detailed information about real property (parcels) in Fairfax County. View the Department of Tax Administration's property ownership, assessment values, sales history, and physical characteristics with interactive property maps.

Fairfax Time Machine

Pick a highlighted area of a map to see an animation of aerial imagery for that area from 1937 to 1990.

Off-line Products and Services

There are many GIS & Mapping resources that are either currently not available on-line or are replicated in our offices. These items may be viewed, copied, and/or purchased at the GIS & Mapping Services office located in Suite 117 on the first floor of the Fairfax County Government Center (see the Contact page for directions, phone numbers, and office hours).

Paper Maps

View information about paper maps available at the GIS & Mapping Services office.

Digital Data Sales

View information about the GIS data sets and maps on disc that are available for sale.

Aerial Photography

Learn about aerial photography available for viewing. The GIS & Mapping Services office has aerial photography dating back to 1937.

Custom Maps

The GIS & Mapping Services office has a computer terminal available for custom map creation.

Paper Maps & Digital Sales Documents

Links to documents for map and data sales including a price list, order form, and license agreement.

GIS Links

Find links to other mapping resources within the County web site and links to other jurisdictions web sites. There are also a collection of GIS and mapping resources from the Internet.



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Technical Questions: Web Administrator

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