Information Technology, GIS Group. County maps and GIS data for Anne Arundel County. Several County Departments have collaborated to provide maps and GIS data for citizens and busine...
Baltimore County Open Data Portal
Information Technology, Business Applications, GIS Team. ArcGIS Open Data Portal for Baltimore County, Maryland.
Calvert County GIS, Historic Maps, Topos
Open geospatial data collection published by Calvert County, Maryland.
Calvert County Open GIS Data Portal
Technology Services Enterprise GIS. ArcGIS Open Data Portal for Calvert County, Maryland.
Carroll County GIS Data Download
Enterprise GIS Division. The Carroll County, Maryland website Enterprise GIS Division page has tiled aerial photography (2000 & 2006) and elevation contours (2015, 2-foot) ...
Enterprise GIS Division. Carroll County Government's GIS Open Data site for exploring thematic topics covered and downloading GIS datasets. Datasets available include addr...
City of Baltimore GIS Open Data
ArcGIS Open Data Portal for the city of Baltimore, Maryland.
Open geospatial data collection published by City of Frederick, Maryland.
Frederick County GIS. Open data for Frederick County, Maryland.
GIS Data Downloads for Queen Anne's County, Maryland
Geographical Information Systems- Mapping. Downloadable data for Property Information, Boundaries, Environmental, Planimetric, and Topography.
Harford County Planning and Zoning Open GIS
Planning and Zoning Department. ArcGIS Open Data Portal for Harford County, Maryland.
Howard County GIS Data Download
Technology and Communication Services, GIS Division. Downloadable data files for Howard County, Maryland.
Montgomery County GIS Open Data
Technology Services, GIS Services. This is the Montgomery County Government GIS Open Data Website used for exploring and downloading public GIS Open Datasets. Available datasets incl...
Information Technology Enterprise GIS. Socrata data portal for the city of Baltimore, Maryland.
Prince George's County Open Data Portal
Information Technology, GIS Division. This is the Prince George's County Open Data portal and includes geospatial datasets. Datasets available include boundaries, roads, election and po...
St Mary's County GIS Downloadable Layers
GIS Agency. Downloadable data files for St. Mary's County, Maryland.
University of Maryland Digital Collections
1590-1975. The Maryland Map collection is a comprehensive collection of more than 2,500 maps depicting Maryland, the Chesapeake Bay, and the surrounding regio...
