Office of the Chief Technology Officer

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DC GIS Services

The District of Columbia Geographic Information System (DC GIS) is coordinated by the Office of the Chief Technology Officer (OCTO) and provides District agencies and the public a 'one-stop shop' for geospatial data and enterprise applications.  As a technology, GIS empowers policymakers and implementers with data and application tools that support better decision-making and performance. Learn how GIS improves quality and lowers the cost of services provided by the DC Government by visiting the links below.

Subscribe to DC GIS UpdatesLearn more about the DC Geographic Information System (DC GIS) program or contact us by email.

Featured Geospatial Data, Tools and Services

DC ArcGIS Online ArcGIS Online

Search to discover data, explore using the interactive map and access data via download and API's

DC Online Mapping

The District offers several online mapping applications highlighting information from various fields of interest such as crime statistics, public school profiles, detailed property information and more.

Download Data from the District Data Catalog

Find over 400 data sets of District agency information made possible through partnerships with OCTO's GIS group and DC government agencies.

Develop Websites Using GIS Web Services

Learn how to make and retrieve online maps and data about Washington DC via web-services. Using these will save time, money and the uncertainty of having the most current data.

Master Address Repository (MAR)

The MAR is a database of building addresses and other location identifiers in the District. Each address in the database has been assigned a unique Address Identification Number (AID), map coordinates and other useful information.

Geospatial Newsletters

Build Apps and Maps with DC ArcGIS 10.2 Map Services

DC publishes better and faster map services in version 10.2.

Related Information

DC GIS Steering Committee

Service Contact: 
Contact Email: 
Contact Phone: 
(202) 727-2277
Contact Fax: 
(202) 727-6857
Contact TTY: 
Contact Suite #: 
5th Floor
Office Hours: 
Monday to Friday, 9 am to 4 pm
Service Location: 

200 I Street, SE

GIS Address: 
200 I Street, SE