The District of Columbia requires a comprehensive range of photogrammetric mapping and GIS database updates and development services. Given the continued redevelopment and growth in the District, it is critical to keep the basemap layers current. In the past year OCTO GIS staff, in coordination with Sanborn and GeoImaging, have worked to update various planimetric layers that better accurately reflect the District’s ground conditions as of 2008. Layers updated and published include:

• Buildings (BldgPly)
• Bridges and Tunnels (BrgTunPly)
• Geodetic Control (GeodeticControlPt)
• Obscured Areas (ObsAreaPly)
• Railroads (RailRdLn)
• Roads (RoadPly)
• Sidewalks (SidewlkPly)
• Wooded Areas (WoodPly)

The planimetric project area covered the entire District of Columbia, approximately 69 square miles. Aerial photography, taken in March and May of 2008, was used to update the planimetric data.

There are more layers Sanborn is updating this summer. They include:

• 3D Buildings
• Curbs
• Bollards
• Grates
• Pools
• Stairs

These layers will support the DDOT asset collection and DC WASA impervious surface needs. They are scheduled for delivery and publication in October 2009.

To request an updated DC GIS Distributed Data DVD please email us.