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Maryland, United States, North America

latitude: 39.04, longitude: -76.6
Browse map of Maryland 39°02′24.00″ N, 76°36′00.00″ W
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Maryland is a state in United States, North America at latitude 39°02′24.00″ North, longitude 76°36′00.00″ West.

Maryland comprises 23 counties and the City of Baltimore. The state capital is Annapolis.

Map Features

Tagging that is mainly relevant to Maryland is described in the Maryland/Map features subwiki.

Open Data Compatibility with OSM

Maryland's entry in the United States Contributors listing for OpenStreetMap states the following:

All Maryland state GIS data is specifically exempted from having any license under state law. The passed law, Senate Bill 94 (2015) repealed the code that gave governments the authority to compel a citizen to enter into a contract (e.g. a license) before distributing geographic data[1].

Further, all local and municipal governments within in the State of Maryland are governed by the same law. Therefore, even if a county or local government website lists a license requirement, the license is invalidated by the law[2]. Some local governments have not updated their terms after the passage of this bill.

Per these state guidelines, you are free to utilize any state, county, or municipal government-provided resources (in accordance with OpenStreetMap guidelines). An index of links to Maryland geographic information resources can be found at Maryland/Mapping Resources.

Social & Communication

There is an active MapTime group in DC called Maptime DC.

Local mappers have established a Slack channel to discuss issues and things of local interest. The channel is hosted on the OpenStreetMap US Slack, in the #maryland channel. Join the Slack here

Project Statuses

This list details the status of various projects around the state.


A few cities in Maryland have separate wikis.

Uses OSM

See Maryland/Uses OSM for a working list of institutions and people using OSM in some capacity.


There are several imports around the state that are under draft or have been completed. This list details well-documented imports.


  1. Heaton, Brian. March 4, 2015. Maryland Legislation Would Encourage Release of GIS Data. Government Technology Magazine.
  2. Maryland Association of Counties. March 25, 2015. Senate Bill 94 Support. PDF.