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#1 County
Historic Area Work Permits
- Organization: Montgomery County of Maryland
- Dataset Last Updated: October 28, 2026
Historic Area Work Permit (HAWP) : All applications for proposed exterior work involving properties listed on the Montgomery County Master Plan for Historic Preservation, either as individual...
- JSON
- XML
- CSV
- KML
- KML
- GEOJSON
Search relevance: 233.38 | Views last month: 1 | Catalog Last Checked: October 28, 2026 at 07:19 PM
#2 City
DC HistoryQuest
- Organization: District of Columbia
- Dataset Last Updated: October 19, 2026 at 10:50 AM
The application, HistoryQuest DC, is an interactive GIS map that provides historical data on approximately 127,000 extant buildings in Washington, DC.The map offers several operational layers of...
- REST
- WEB
Search relevance: 61.70 | Views last month: 0 | Catalog Last Checked: October 20, 2026 at 10:24 PM

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