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About Our Data

Calvert County GIS data is maintained to the best ability of Calvert County Government. GIS data is provided “as is” and users assume all risks associated with decisions based on this data. Digital data is distributed under  a Creative Commons Attribution 4.0 International License.

Unless otherwise specified, all Calvert County GIS data are stored in the spatial reference outlined below:
Projected Coordinate System: Maryland State Plane FIPS 1900 Feet 
Datum: North American Datum 1983 
Geographic Coordinate System: GCS North American 1983 
WKID : 2248


GIS Data Distribution

Calvert County GIS makes several digital datasets available for free download in an ESRI shapefile, ESRI geodatabase or KML format. See our Open GIS Data page for a searchable list of downloadable datasets.

Topographic data is also available for download in a .dwg format based on the Calvert County Topo Tile Grid System. The topographic data are based on the 2011 aerial photography. 

Download the GIS topographic/planimetric data dictionary & layer descriptions

Use the interactive map below to find the topo grid of your choice by panning and zooming the map. Click on the map inside the grid you want to download and then click the link in the popup box to retrieve your data.




Paper Maps 

Customers may create and print their own 8.5”x11” topographic and aerial maps from our interactive maps page. The Property and Topo Map is especially well suited for printing maps that are suitable for county building permit submissions.

Large-format custom maps are available by special order and priced according to size and complexity. Customer should submit a Topographic Map Request Form and submit it to the Department of Technology Services. Custom map requests generally take 2-3 days to complete and must be picked up in our office at 176 Main Street in Prince Frederick.

For more information please contact us.

Contact Us
Erick Pate
GIS Administrator
410-535-1600 ext. 2611 

Lionell Sewell
GIS Analyst
410-535-1600 ext. 2756 

Email or contact us
Ph: 410-535-1600 ext. 2511
Fx: 410-535-2181

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Mailing Address:
Calvert County GIS
Dept. of Technology Services
Calvert County Government
175 Main Street
Prince Frederick, MD 20678

Physical Location:
Calvert County GIS
Dept. of Technology Services
176 Main Street, Suite 102
Prince Frederick, MD 20678

N 38.538902° W -76.582696°

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