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Data, demographics and maps

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:

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