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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Discover DC With Online Mapping

The Chief Technology Office's DC GIS program delivers quality and effective information to citizens, visitors and employees. By working collectively with intergovernmental agencies, and the larger GIS community, OCTO provides a variety of online mapping systems. Discover DC with the various online mapping applications now available with data from across District government agencies.

Learn more about the District of Columbia Geographic Information System.

Atlas Plus

DC Atlas Plus allows users to search and identify over 300 different types of data – making it an all-inclusive point of reference for DC geographic information.

Days: Monday - Friday

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Wi-fi Hotspots

Use this map to find information for DC.Gov Wi-Fi Hot Spots.

Days: Monday - Friday

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DC 311 Mapping Application

The District of Columbia’s 311 Map allows you to see 311 service requests by location, date (2days, 7days and 30 days) and Status.


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Residents and visitors can enter a location and destination to view the many transportation options in the District.

Days: Monday - Friday

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Real Property Finder

Find information about more than 170,000 properties in DC by typing in a property address or a square, suffix and lot number.

Days: Monday - Friday

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Master Address Repository

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.

Days: Monday - Friday

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DC Geographic Resources

DC Geographic Information System

DC Geographic Information System (DC GIS)

The DC GIS program works to improve the quality and lower the cost of services provided by the DC government, through the District's collective investment and effective application of geospatial data and systems.

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Citywide Data Warehouse

Democratizes government data by providing a centralized access point for citywide data.

View all online maps »