Data Catalog

• History Quest DC

  District of Columbia —

  This application, HistoryQuest DC, is an interactive GIS map that provides historical data on approximately 193,000 extant buildings in Washington, D.C. The map offers...

  • HTML
  • ArcGIS GeoServices REST API

• Historic Landmark Elements

  District of Columbia —

  This dataset contains Historic Landmark Elements (by structure) officially designated by the District of Columbia. This is a consolidated collection of structures with...

  • HTML
  • ArcGIS GeoServices REST API
  • OGC WMS
  • CSV
  • ZIP
  • GeoJSON
  • 1 more in dataset

• Potential Landmarks

  District of Columbia —

  This dataset contains Historic Landmarks (by structure) officially designated by the District of Columbia. This is a consolidated collection of structures with...

  • HTML
  • ArcGIS GeoServices REST API
  • OGC WMS
  • CSV
  • ZIP
  • GeoJSON
  • 1 more in dataset
• City

  Philadelphia Registered Historic Districts

  City of Philadelphia —

  Historic districts listed on the Philadelphia Register. Data was updated by the Philadelphia City Planning Commission in August 2017. The public can confirm a...

  • CSV
  • GeoJSON
  • SHP
  • API
  • HTML
• City

  Philadelphia Registered Historic Properties

  City of Philadelphia —

  Historic sites listed on the Philadelphia Register. Data was updated by the Philadelphia City Planning Commission in July 2017. The public should confirm a property’s...

  • CSV
  • GeoJSON
  • SHP
  • API
  • HTML
• City

  Historic and Special Review Districts

  City of Seattle —

  Note: This map is not an official zoning map. For precise zoning information, please call or visit the Seattle Municipal Tower, Seattle Department of Construction and...

  • HTML
  • JSON
  • CSV
  • ZIP
  • application/vnd.geo+json
  • KML
  • 5 more in dataset

• Zoning Lookup Layer

  District of Columbia —

  The zoning layer lookup aids the online zoning map to show zoning information by address and consolidates other important information such as Ward, ANC, SMD, Historic...

  • HTML
  • ArcGIS GeoServices REST API
  • OGC WMS
  • CSV
  • ZIP
  • GeoJSON
  • 1 more in dataset

• Historic Districts

  District of Columbia —

  This dataset contains Historic Districts officially designated by the District of Columbia. Additional data sets are also available providing information on (1)...

  • HTML
  • ArcGIS GeoServices REST API
  • OGC WMS
  • CSV
  • ZIP
  • GeoJSON
  • 1 more in dataset
• City

  Civic Center Cultural Landscape Inventory

  City of San Francisco —

  The Civic Center Cultural Landscape Inventory provides information about the historic landscape features that contribute to the Civic Center Historic District. For...

  • ZIP
• County

  Loudoun Historic Districts

  Loudoun County, Virginia —

  More MetadataThe data set identifies the six county-administered Historic and Cultural Conservation District areas within Loudoun County. The County-designated...

  • HTML
  • ArcGIS GeoServices REST API
  • GeoJSON
  • CSV
  • KML
  • ZIP

• Historic Landmarks Points

  District of Columbia —

  This dataset contains Historic Landmarks (by structure) officially designated by the District of Columbia. This is a consolidated collection of structures with...

  • HTML
  • ArcGIS GeoServices REST API
  • OGC WMS
  • CSV
  • ZIP
  • GeoJSON
  • 1 more in dataset

You can also access this registry using the API (see API Docs).

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