95 datasets found
  1. d

    WebLogis - Loudoun County Online Mapping System

    • catalog.data.gov
    • data.virginia.gov
    • +2more
    Updated Sep 6, 2024
    + more versions
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    Loudoun County GIS (2024). WebLogis - Loudoun County Online Mapping System [Dataset]. https://catalog.data.gov/dataset/weblogis-loudoun-county-online-mapping-system-b42b7
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    Dataset updated
    Sep 6, 2024
    Dataset provided by
    Loudoun County GIS
    Area covered
    Loudoun County
    Description

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

  2. V

    Loudoun County Boundary

    • data.virginia.gov
    • transportation-loudoungis.opendata.arcgis.com
    • +4more
    Updated Feb 6, 2017
    + more versions
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    Loudoun County (2017). Loudoun County Boundary [Dataset]. https://data.virginia.gov/dataset/loudoun-county-boundary
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    arcgis geoservices rest api, htmlAvailable download formats
    Dataset updated
    Feb 6, 2017
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    Loudoun County, Virginia Boundary

  3. K

    Loudoun County, Virginia Topography (4ft)

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 26, 2019
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Topography (4ft) [Dataset]. https://koordinates.com/layer/100132-loudoun-county-virginia-topography-4ft/
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    dwg, geodatabase, geopackage / sqlite, shapefile, mapinfo mif, mapinfo tab, kml, pdf, csvAvailable download formats
    Dataset updated
    Apr 26, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  4. V

    Loudoun Address Points

    • data.virginia.gov
    • business-loudoungis.opendata.arcgis.com
    • +9more
    Updated Feb 2, 2024
    + more versions
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    Loudoun County (2024). Loudoun Address Points [Dataset]. https://data.virginia.gov/dataset/loudoun-address-points
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    geojson, kml, html, zip, arcgis geoservices rest api, csvAvailable download formats
    Dataset updated
    Feb 2, 2024
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    More Metadata


    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

  5. V

    Loudoun Parcels

    • data.virginia.gov
    • business-loudoungis.opendata.arcgis.com
    • +7more
    Updated Apr 15, 2025
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    Loudoun County (2025). Loudoun Parcels [Dataset]. https://data.virginia.gov/dataset/loudoun-parcels
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    html, arcgis geoservices rest api, zip, geojson, csv, kmlAvailable download formats
    Dataset updated
    Apr 15, 2025
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    Data updated daily.

    A parcel is a tract or plot of land surveyed and defined by legal ownership. Data were compiled from plats and deeds recorded at the Clerk of the Court and from historic tax maps. Source material was digitized or the coordinates were entered into the database via ARC/INFO Coordinate Geometry (COGO). Digital data from engineering companies has also been incorporated for newer subdivisions. A MCPI number is used to identify each parcel, which is a unique ID number further explained below. Purpose: Parcels are used to support a variety of services including assessment, permitting, subdivision review, planning, zoning, and economic development. Parcel data were initially developed to replace existing tax maps. As a result, there are parcel polygons digitized from tax maps that do not represent land parcels but are taxable entities such as leaseholds or easements. 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: Parcels are updated on an hourly basis from recorded deeds and plats. Depending on volume and date of receipt of recordation information, data may be updated 2-3 weeks following recordation. 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. MCPI: 9 digit unique parcel ID that is a combination of: MAP, CELL, and PARCEL. MAP: 3 digit map number (001-701) corresponding with map tile index. CELL: 2 digit map grid location of parcel center; the grid is comprised of 1000 by 1000 ft grid cells numbered as rows and columns (Columns numbered > 5 6 7 8 9 0; Rows numbered > 1 2 3 4). PARCEL: 4 digit location of polygon center based on the 1927 Virginia State Plane coordinate grid where an easting and northing measurement is taken. example: 6654 from: E 2229668 N475545. The MAP, CELL, and PARCEL values of a parcel do not change when a parcel is altered by a boundary line adjustment or becomes residue from a subdivision. The MAP, CELL, and PARCEL values may therefore be inconsistent with the location of polygon center. MAP, CELL, and PARCEL values have been manually altered for some parcels to agree with other databases; as a result, not all parcels can be located by the MAP, CELL, and PARCEL values. Data Owner: Office of Mapping and Geographic Information
  6. d

    Loudoun Land Use Existing Parcels

    • catalog.data.gov
    • data.virginia.gov
    • +9more
    Updated Sep 20, 2024
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    Loudoun County GIS (2024). Loudoun Land Use Existing Parcels [Dataset]. https://catalog.data.gov/dataset/loudoun-land-use-existing-parcels-6643c
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    Dataset updated
    Sep 20, 2024
    Dataset provided by
    Loudoun County GIS
    Area covered
    Loudoun County
    Description

    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).

  7. K

    Loudoun County, Virginia Steep Slope

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 25, 2019
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Steep Slope [Dataset]. https://koordinates.com/layer/100124-loudoun-county-virginia-steep-slope/
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    geopackage / sqlite, kml, mapinfo mif, geodatabase, csv, shapefile, mapinfo tab, dwg, pdfAvailable download formats
    Dataset updated
    Apr 25, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  8. a

    Loudoun County Owned and Leased

    • geohub-loudoungis.opendata.arcgis.com
    • data.virginia.gov
    • +7more
    Updated Oct 17, 2017
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    Loudoun County Owned and Leased [Dataset]. https://geohub-loudoungis.opendata.arcgis.com/datasets/loudoun-county-owned-and-leased
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    Dataset updated
    Oct 17, 2017
    Dataset authored and provided by
    Loudoun County GIS
    Area covered
    Description

    More MetadataThis 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.

  9. d

    Loudoun Imagery 2022

    • catalog.data.gov
    • data.virginia.gov
    • +7more
    Updated Nov 1, 2024
    + more versions
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    Loudoun County GIS (2024). Loudoun Imagery 2022 [Dataset]. https://catalog.data.gov/dataset/loudoun-imagery-2022
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    Dataset updated
    Nov 1, 2024
    Dataset provided by
    Loudoun County GIS
    Area covered
    Loudoun County
    Description

    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 2022, 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)."February 2022 Photography flown by the Sanborn Map Company, Colorado Springs, CO." "Digital Orthophotography compiled by Sanborn Map Company, Colorado Springs, CO"

  10. K

    Loudoun County, Virginia Parcels

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 26, 2019
    + more versions
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Parcels [Dataset]. https://koordinates.com/layer/100154-loudoun-county-virginia-parcels/
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    csv, geodatabase, dwg, pdf, mapinfo mif, mapinfo tab, geopackage / sqlite, shapefile, kmlAvailable download formats
    Dataset updated
    Apr 26, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  11. V

    Unpaved Roads of Loudoun County

    • data.virginia.gov
    • datasets.ai
    • +2more
    Updated Mar 19, 2025
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    Loudoun County (2025). Unpaved Roads of Loudoun County [Dataset]. https://data.virginia.gov/dataset/unpaved-roads-of-loudoun-county
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    html, arcgis geoservices rest apiAvailable download formats
    Dataset updated
    Mar 19, 2025
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    This application uses surface type data to illustrate the extensive network of unpaved roads in Loudoun County, Virginia.

  12. K

    Loudoun County, Virginia Floodplain

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 25, 2019
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Floodplain [Dataset]. https://koordinates.com/layer/100126-loudoun-county-virginia-floodplain/
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    geodatabase, mapinfo mif, mapinfo tab, pdf, kml, geopackage / sqlite, dwg, csv, shapefileAvailable download formats
    Dataset updated
    Apr 25, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  13. d

    Loudoun Imagery 1937

    • catalog.data.gov
    • data.virginia.gov
    • +9more
    Updated Sep 2, 2022
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    Loudoun GIS (2022). Loudoun Imagery 1937 [Dataset]. https://catalog.data.gov/dataset/loudoun-imagery-1937-222cd
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    Dataset updated
    Sep 2, 2022
    Dataset provided by
    Loudoun GIS
    Area covered
    Loudoun County
    Description

    This data set contains the 1937 aerial imagery for the majority of Loudoun County, VA. It is composed of United States Farm Service Agency (USDA FSA) hardcopy imagery, which were scanned, georeferenced, and mosaicked by Loudoun County OMAGI to produce digital representations. This aerial imagery is at a much larger scale than the County's other Historical Raster image (1957). There are only 200 photos that cover Loudoun County for the 37 imagery, as opposed to 700 for the 57.

  14. V

    Loudoun 2020 Census Towns

    • data.virginia.gov
    • catalog.data.gov
    • +7more
    Updated Sep 12, 2023
    + more versions
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    Loudoun County (2023). Loudoun 2020 Census Towns [Dataset]. https://data.virginia.gov/dataset/loudoun-2020-census-towns
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    arcgis geoservices rest api, geojson, kml, csv, zip, htmlAvailable download formats
    Dataset updated
    Sep 12, 2023
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    This GIS layer contains the geographical boundaries of the incorporated towns as of the 2020 Census.

  15. V

    Loudoun Imagery 2023

    • data.virginia.gov
    • catalog.data.gov
    • +4more
    Updated Aug 23, 2023
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    Loudoun County (2023). Loudoun Imagery 2023 [Dataset]. https://data.virginia.gov/dataset/loudoun-imagery-2023
    Explore at:
    arcgis geoservices rest api, htmlAvailable download formats
    Dataset updated
    Aug 23, 2023
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    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 2023, 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 2023 Photography flown by The Sanborn Map Company, Inc. Colorado Springs, CO." "Digital Orthophotography compiled by Sanborn Map Company, Inc. Colorado Springs, CO"

  16. K

    Loudoun County, Virginia Hydrography

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 26, 2019
    + more versions
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Hydrography [Dataset]. https://koordinates.com/layer/100167-loudoun-county-virginia-hydrography/
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    shapefile, pdf, geopackage / sqlite, dwg, csv, mapinfo tab, mapinfo mif, kml, geodatabaseAvailable download formats
    Dataset updated
    Apr 26, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  17. V

    Loudoun Drainfields

    • data.virginia.gov
    • data.amerigeoss.org
    • +8more
    Updated Sep 12, 2023
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    Loudoun County (2023). Loudoun Drainfields [Dataset]. https://data.virginia.gov/dataset/loudoun-drainfields
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    arcgis geoservices rest api, csv, kml, html, geojson, zipAvailable download formats
    Dataset updated
    Sep 12, 2023
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Area covered
    Loudoun County
    Description

    The data set of water wells and pollution sources in the county that have been identified and assigned a unique SITE-ID number. Drain fields are independent, private sewage disposal systems denoted with PSSD. Cemeteries are included as a potential groundwater and soil pollution source. Within this data set, the majority of wells are individual potable water wells and the majority of pollution sources are individual sewage disposal (septic/drain field) systems. Other types of wells and pollution sources, like cemeteries, also exist in the data and are listed and explained in the data dictionary. Note that all identified pollution sources are not necessarily causing pollution but, rather, can be simply a potential source of pollution. Information for wells comes primarily from State Groundwater Well Completion (GW2) forms completed by well drilling contractors and varies in accuracy and completeness. Information for pollution sources comes primarily from the Health Department permitting and inspection process and/or date of discovery from field verification.

  18. K

    Loudoun County, Virginia Intersections

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 26, 2019
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Intersections [Dataset]. https://koordinates.com/layer/100153-loudoun-county-virginia-intersections/
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    geopackage / sqlite, pdf, mapinfo tab, geodatabase, kml, csv, shapefile, dwg, mapinfo mifAvailable download formats
    Dataset updated
    Apr 26, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  19. K

    Loudoun County, Virginia Watersheds

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Apr 26, 2019
    + more versions
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    Loudoun County, Virginia (2019). Loudoun County, Virginia Watersheds [Dataset]. https://koordinates.com/layer/100134-loudoun-county-virginia-watersheds/
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    geopackage / sqlite, csv, mapinfo tab, kml, dwg, geodatabase, mapinfo mif, pdf, shapefileAvailable download formats
    Dataset updated
    Apr 26, 2019
    Dataset authored and provided by
    Loudoun County, Virginia
    Area covered
    Description

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

  20. V

    Town Boundaries

    • data.virginia.gov
    • hub.arcgis.com
    • +4more
    Updated Feb 6, 2017
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    Loudoun County (2017). Town Boundaries [Dataset]. https://data.virginia.gov/dataset/town-boundaries
    Explore at:
    html, csv, zip, kml, arcgis geoservices rest api, geojsonAvailable download formats
    Dataset updated
    Feb 6, 2017
    Dataset provided by
    Loudoun County GIS
    Authors
    Loudoun County
    Description

    Loudoun County, Virginia Boundary

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Loudoun County GIS (2024). WebLogis - Loudoun County Online Mapping System [Dataset]. https://catalog.data.gov/dataset/weblogis-loudoun-county-online-mapping-system-b42b7

WebLogis - Loudoun County Online Mapping System

Explore at:
Dataset updated
Sep 6, 2024
Dataset provided by
Loudoun County GIS
Area covered
Loudoun County
Description

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

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