The District's street centerline dataset is used for street labeling, routing, geocoding, and other transportation applications and services. Critical to these services are the address ranges which define potential addresses for every street segment in the District.  As a result of recent efforts, DC Geographic Information Systems (DC GIS) has updated the address ranges so they are more complete and useful.

While the address ranges were populated and checked during the original creation of the SSD, issues existed related to address range integrity and completeness.  Consequently, DC GIS updated and enhanced the address ranges in the street centerline file in the fall of 2007.  Using the addresses in the Master Address Repository and existing ranges in the street centerline file, DC GIS performed the following tasks:

• Checked the integrity and completeness of theoretical ranges for street segments.
• Identified and repaired segments where address range gaps, overlaps, and duplications existed.
• Assigned address ranges to new street segments. 

The District Department of Transportation (DDOT) integrated the updated ranges into the Street Spatial Database in January 2008.  In addition, DC GIS developed procedures to review and update address ranges as new streets are identified and added to the street centerline file.  The DDOT street centerline file is available via the GIS Data Search page at http://dcgis.dc.gov