The PWC GIS Data Portal is the platform used to increase public access to valuable GIS data created, maintained, licensed, and stored by Prince William County for county agencies and the people we serve.Browse by category or enter keywords in the search box to locate a dataset of interest, read its description, learn more about its authoritative data source, and explore attributes before downloading.

Vector polygon map data of property parcels from Prince William County, Virginia containing 152,739 features.

Property parcel GIS map data consists of detailed information about individual land parcels, including their boundaries, ownership details, and geographic coordinates.

Property parcel data can be used to analyze and visualize land-related information for purposes such as real estate assessment, urban planning, or environmental management.

Available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

This layer is for the recreational parks in Prince William County of all levels. The layer includes federal, state, county, and private parks. It is intended for use on County Mapper and other mapping applications but is also used to track park land in PWC

Geospatial data about Prince William County, Virginia Contours. Export to CAD, GIS, PDF, CSV and access via API.

[Missing ground-truthing and nearshore fish sampling data]

ShoreZone is a coastal habitat mapping and classification system in which georeferenced aerial imagery is collected specifically for the interpretation and integration of geological and biological features of the intertidal zone and nearshore environment. Oblique low-altitude aerial video and digital still imagery of the coastal zone is collected during summer low tides (zero tide level or lower), usually from a helicopter flying at <100 m altitude. The flight trackline is recorded at 1-second intervals using electronic navigation software and is continuously monitored in-flight to ensure all shorelines have been imaged. Video and still imagery collected are georeferenced and time-synchronized. Video imagery is accompanied by continuous, simultaneous commentary by a geologist and a biologist aboard the aircraft. The imagery and commentary are later used in the definition of discrete along-shore coastal habitat units and the "mapping" of observed physical, geomorphic, sedimentary, and biological features in those units.

This data package is an excerpt of the Exxon Valdez oil spill extent. Full Gulf of Alaska data is available online at: http://mapping.fakr.noaa.gov/szflex/ and http://alaskafisheries.noaa.gov/shorezone.

Publications: Lindeberg, M. 2007. ShoreZone Mapping for Prince William Sound. Exxon Valdez Oil Spill Trustee Council Annual Report (070805). National Oceanic and Atmospheric Administration, National Marine Fisheries Office, Alaska Regional Office.

This dataset provides a geographic representation of the jurisdictional boundary and parcels in the Town of Dumfries. This data is provided by Prince William County. https://gisdata-pwcgov.opendata.arcgis.com/

Geospatial data about Prince William County, Virginia Precincts. Export to CAD, GIS, PDF, CSV and access via API.

Environmental Sensitivity Index (ESI) data characterize the marine and coastal environments and wildlife based on sensitivity to spilled oil. There are three main components: shoreline habitats, sensitive biological resources, and human-use resources. The shoreline and intertidal areas are ranked based on sensitivity determined by: (1) Shoreline type (substrate, grain size, tidal elevation, origin); (2) Exposure to wave and tidal energy; (3) Biological productivity and sensitivity; and (4) Ease of cleanup. The biology layers focus on threatened/endangered species, areas of high concentration and areas where sensitive life stages may occur. Supporting data tables provide species/location-specific abundance, seasonality, status, life history, and source information Human use resources mapped include managed areas (parks, refuges, critical habitats, etc) and resources that may be impacted by oiling and/or clean-up, such as beaches, archaeological sites marinas etc. ESIs are available for the majority of the US coastline, as well as the US territories. ESI data are available in a variety of GIS formats as well as PDF maps.For more information go to or to download complete ESI data sets go to: https://response.restoration.noaa.gov/esiFor the full metadata record please go to: https://www.fisheries.noaa.gov/inport/item/46684For online ESI query tools, see the Environmental Response Management Application (ERMA): https://response.restoration.noaa.gov/resources/maps-and-spatial-data/environmental-response-management-application-erma

A Green Infrastructure map county of Prince William, VA was developed to provide quantification of canopy and associated data for environmental monitoring. Digital aerial imagery, collected for the National Agriculture Imagery (NAIP) program at 1 meter resolution was classified to a Green Infrastructure Level 1 classification scheme with the following classes: 1) Non Woody Vegetation, 2)Woody Vegetation, 3) Impervious, 4) Water and 5) Bare Soil. The image was classified using Classification and Regression Tree techniques (CART analysis) and raster modeling. The classification accuracy assessment gave an overall accuracy of 95.25%This 2012 update is the result of a change detection process which buillt on the original 2008 classification. Changed areas were updated, and several other classification scheme changes were made, such as the reclassification of pools as impervious surfaces.

Geospatial data about Prince William County, Virginia Power Lines. Export to CAD, GIS, PDF, CSV and access via API.