Mayor Vincent C. Gray

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About OCTO

Data

Maps & Apps

Agency Support

OCTO Logo

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
octo@dc.gov

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

FOIA Information
Agency Performance

Website: http://octo.dc.gov

DC Digital Inclusion 


Rob Mancini
Chief Technology Officer

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Addressing and Property Standards 


The Master Address Repository (MAR) serves as the source repository for addressing information in the District. The MAR provides District agencies with an authoritative single source for accurate address data within the District of Columbia. Each address contained in the Master Address Repository is linked to a specific geographic feature that is contained within the DC GIS central database.

Agencies are encouraged to adhere to the following guidelines when creating or appending geospatial data by geocoding addresses:

  • Use the MAR (point geocoding against address points) as the primary method for geocoding.
  • If the above method fails, use the MAR to validate individual address components (street name, quad, zip code, etc) and rerun.
  • Use interpolation between address points as the secondary method of geocoding.
  • Use street centerlines address ranges as the tertiary method of geocoding.
  • Note in the record which of the above methods was used to geocode each point.
  • If geocoding against the MAR was successful, store the AID (address identification number) returned by the MAR in your local database.
  • If the MAR fails or returns suspect results, report them to DC GIS.

 

Find a location in DC using street address, intersection, block or place name.

Service Need

The Master Address Repository (MAR) serves as the source repository for addressing information in the District. The MAR provides District agencies with an authoritative single source for accurate address data within the District of Columbia.

Service at a Glance

Provided By: OCTO
Phone: (202) 724-5135
Frequency: Every Day
Location: 200 I Street SE, 5th Floor Washington, DC 20003