Mayor Vincent C. Gray

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About OCTO


Maps & Apps

Agency Support


Office of the Chief Technology Officer

Office Hours
Monday through Friday, 8:30 am - 5:30 pm

How to Reach Us
200 I Street, SE
5th Floor
Washington, DC 20003

Phone: (202) 727-2277
Fax: (202) 727-6857
TTY: 711

FOIA Information
Agency Performance


DC Digital Inclusion 

Rob Mancini
Chief Technology Officer

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Geospatial Services

DC GISThe 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.

Learn more about the program or contact us by e-mail.

Subscribe to DC GIS Updates


Featured Geospatial Data, Tools and Services

Discover DC with Online Mapping

Discover DC with 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.

more online mapping »
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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.

read about the data catalog »

Develop Websites Using GIS Web Services

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

learn how to use »
Find a location in DC using street address, intersection, block or place name.

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.

view a sample web client »

Geospatial Newsletters

Geospatial Data Published in November of 2013

Geospatial Data Published in November of 2013

OCTO operates a data maintenance and enhancement program to keep data current and introduce new and valuable GIS layers to the District government and public.

visit the agency newsroom »
Build Apps and Maps with DC ArcGIS 10.2 Map Services

Build Apps and Maps with DC ArcGIS 10.2 Map Services

DC published better and faster map services in version 10.2

visit the agency newsroom »