A global collection of building polygon data, open and free to use.
Currently just a basic list of potential sources to track openaddresses style
| Coverage | Source |
|---|---|
| Statewide | https://maps2.dcgis.dc.gov/dcgis/rest/services/DCGIS_DATA/Facility_and_Structure/MapServer/1 |
| Coverage | Source |
|---|---|
| Allegany County | http://alleganygis.allconet.org/allcogis/rest/services/Dashboards/BWPermits/MapServer/11 |
| Anne Arundel County | http://www.aacounty.org/AACoOIT/GIS/aaco_buildings.zip |
| Baltimore City | https://maps.baltimorecity.gov/egis/rest/services/OpenBaltimore/Building_Footprint/MapServer/0 |
| Baltimore County | https://bcgis.baltimorecountymd.gov/arcgis/rest/services/Facilities/Buildings/MapServer/2/query?outFields=*&where=1%3D1 |
| Calvert County | http://calvertgis.co.cal.md.us/arcgis/rest/services/Basemaps/Streets_Base_Map/MapServer/10 |
| Caroline County | `` |
| Carroll County | https://services.arcgis.com/Uf0DiYpD9NOFO5YH/ArcGIS/rest/services/Buildings_CarrollCounty/FeatureServer/0 |
| Cecil County | http://cecilmaps.ccgov.org/arcgis/rest/services/Public_10_1/MapServer/5, http://cecilmaps.ccgov.org/arcgis/rest/services/Public_10_1/MapServer/6 |
| Charles County | `` |
| Dorchester County | `` |
| Frederick County | `` |
| Garrett County | `` |
| Harford County | `` |
| Howard County | `` |
| Kent County | `` |
| Montgomery County | `` |
| Prince George's County | `` |
| Queen Anne's County | `` |
| Saint Mary's County | `` |
| Somerset County | `` |
| Talbot County | `` |
| Washington County | `` |
| Wicomico County | `` |
| Worcester County | `` |