Loudoun Water Bodies
Loudoun County
Updated Oct 10, 2026
About this dataset
<div><a href='https://logis.loudoun.gov/metadata/Water.html' target='_blank'>More Metadata</a><br /></div><div><br /></div>Water Bodies are used for water supply planning, the administration of related zoning restrictions, and to locate water supplies in rural areas for fighting fires.<em>Supplemental_Information:</em>Data are stored in the corporate ArcSDE Geodatabase as a polygon feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN, Vertical datum, NAVD88, US Survey foot units. OMAGI updates all base map data via a photogrammetric process, using aerial imagery that is flown yearly in phases. A different portion of the County is updated each year with the base map maintenance services contract, depending upon development patterns and update funding. See "Lineage" section for the list of extents for each Phase area, which are listed as “Data Sources”. The field “UPD_DATE” indicates the date a feature was last re-mapped, although it may have been reviewed for changes more recently. For a map of the most recent reviews and updates within the county, please see <a href='http://www.flickr.com/photos/omagi/8371423446/'><http://www.flickr.com/photos/omagi/8371423446/></a>
Data and resources (6)
- HTML
ArcGIS Hub Dataset
Modified Apr 10, 2026
- ArcGIS
ArcGIS GeoService
Modified Apr 10, 2026Map preview available
- CSV
CSV
Modified Oct 10, 2026Table and Data API available
- ZIP
Shapefile
Modified Apr 10, 2026Map preview available
- GeoJSON
GeoJSON
Modified Apr 10, 2026Map preview available
- KML
KML
Modified Apr 10, 2026Map preview available