WebLogis, Loudoun County's Online Mapping System. Provides access to the County’s Enterprise Geographic Information System data layers.

More MetadataThis layer identifies existing parcels within Loudoun County and their current Land Use. The existing structures data source is Loudoun County VA, Office of Mapping & Geographic Information's (OMAGI) addressable structure layer for all of Loudoun County, VA. All residential uses, which includes Single Family, Multi-Family and Group Quarter uses, are specified and existing Commercial structures (Offices, Retail, Medical Offices, Data Centers, etc.) are combined into a single Non-Residential use. The other uses specifically identified are HOA (Home owner Association owned parcels), Miscellaneous (no employment generating), and Multi-Use (2 different uses), and Vacant (parcel with no land use).

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Data updated daily.

Address points mark the location of each addressable structure and its access point. The access point is the place where a driveway intersects the road. The building point is where the structure is located. An addressable structure is one where people live, work, or gather. A 1 to 5-digit number designates an address. Purpose: The access point is used to assign an address to the structure. Addresses are also assigned to assist in the provision of emergency services; they can be queried at all Fire and Rescue stations and by E-911 dispatchers. Supplemental Information: Data are stored in the corporate ArcSDE Geodatabase as a feature class. The coordinate system is Virginia State Plane (North), Zone 4501, datum NAD83 HARN. Maintenance and Update Frequency: Daily Completeness Report: Features may have been eliminated or generalized due to scale and intended use. To assist Loudoun County, Virginia in the maintenance of the data, please provide any information concerning discovered errors, omissions, or other discrepancies found in the data.

Data Owner: Office of Mapping and Geographic Information

This interactive map includes build telecommunication facilities, dark fiber (both future and in progress), and other telecommunication-related data. In September 2020, the Loudoun County Board of Supervisors directed staff to document telecommunication projects completed, in-progress, and future projects, using the 2014 Wireless GAP Analysis and the Segra Dark Fiber Area Network. Staff mapped the data identified by the Board, as well as other information related to telecommunication projects. This information was then used to identify select unserved or underserved geographic areas of the county.The companion Story Map steps through each dataset used in the project.

Geospatial data about Loudoun County, Virginia Topography (4ft). Export to CAD, GIS, PDF, CSV and access via API.

Loudoun County annually obtains leaf-off, aerial imagery in the spring. Since 2004, the County has utilized this imagery to support the development of an annual digital orthophoto base. In 2021, the imagery was captured with a Vexcel Ultracam Eagle digital camera, in 4-band (R,G,B, and NIR) format. These files contain 1-foot ground-resolution, 8-bit, 4-band orthorectified aerial image map products in GeoTIFF version 6.0 file format. GeoTIFF files are uncompressed raster images complete with TFW coordinate information. The aerial imagery project encompasses the entire land area of the County of Loudoun, VA. Images were flown during leaf-off conditions and cover 5000' by 5000' and are tiled according to the VBMP 200-scale gridding schema (Virginia Geographic Information Network)."March 2021 Photography flown by the Sanborn Map Company, Colorado Springs, CO." "Digital Orthophotography compiled by Sanborn Map Company, Colorado Springs, CO"

Loudoun County, Virginia Boundary

DO NOT DELETE OR MODIFY THIS ITEM. This item is managed by the Open Data application. To make changes to this site, please visit https://opendata.arcgis.com/admin/

This point feature class contains all the identified Loudoun County Park and Ride vehicle lots according to the Loudoun County Office of Transportation and Capital Infrastructure. Update Frequency: As needed

Geospatial data about Loudoun County, Virginia Parcel Boundaries. Export to CAD, GIS, PDF, CSV and access via API.

More MetadataThis Water Well layer was created in March 2010 to provide an easily accessiable spatial database of water wells only. It also provides additional attribute information on Status, Depth, etc.The original water well & pollution source layer was developed in 1988 by the County’s Environmental Health Department. Records were entered into a database from 40 years of historical paper files, which exhibited a wide range of completeness and accuracy. This was an on-going process until early 1996 at which time the layer was no longer maintained. In late 2000, the Department of Building and Development began a process of updating the layer by entering data from the permit files, which had accumulated since 1996.

The Residential Communities of Loudoun County map let's you search by address or by residential community (subdivision project) name. Click on a community for more information, including percent complete, the number of units allowed and left to build, and the size. Zoom in further to see the parcels within a community. You can also search by Other Name to find incorporated towns, villages, or historic place names.For even more information about subdivision projects, please see our Existing and Potential Development Tool (EPD). Questions? Please contact the Loudoun County Department of Planning and Zoning at 703.777.0246 or dpz@loudoun.gov.More information on the Loudoun Residential Communities Interactive Map page.

More MetadataPlanar Index of Loudoun County is used primarily for locator reference and establishes the first 3 digits in the MCPI number for parcels. This information can also be known as Map, Sheet, or Tile number in other data sets.The index coverage contains approximately 690 polygons which coincide with Loudoun County's GIS library tile system. Digital Data orders and associated maps are available to the extent of any individual tile as well as county wide. Each tile is designated with a unique ID number that is used in GIS data orders to identify the area of interest.

DATA MAINTENANCE / UPDATE FREQUENCY: ANNUALLY - DATA LAST UPDATED BASED ON 2023 IMAGERY More MetadataTree Points are a base map data layer derived by automated processes and processed for cartographic representation at 1:2400 scale. The point features represent any isolated, visible, single standing tree as seen from above and are mapped to National Map Accuracy Standards (NMAS). These may be orchards, single specimen trees or rows of landscape tree features that together do not comprise a polygonal forest feature.

Geospatial data about Loudoun County, Virginia Steep Slope. Export to CAD, GIS, PDF, CSV and access via API.

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This feature class contains all the county owned and leased property data of Loudoun County, VA as of April 2024. It is comprised from internal data and information sources combined with parcel data.