This layer contains the buildings that have been captured through various processes. The original data in this layer was captured during the 1997 data conversion effort for Fairfax County. Subsequent to that an update capture was completed in 2014 using stereo models from the 2009 Virginia State imagery. The most recent building footprints update was completed in 2022 using stereo models from the 2017 Virginia State imagery. In between these planimetric update projects the GIS office has captured building footprints from orthophotography by performing heads up digitizing from site plans. These different sources of the buildings are indicated within the building attributes as well as the type of building.

The buildings also include a building top and ground location and elevation value both in NAVD88 and NGVD29 datum. These locations indicate the highest point on a building based on the primary usable structure and the lowest elevation point of the structure. There are also buildings that may be multiple components that will make up a podium building. In this case there will be multiple polygons stacked on top of each other for a single building identifier. The difference of each polygon is the top elevation. This can be then used to extrude these structures to more approximate the look of these podium types of buildings.

Contact: Fairfax County Department of Information Technology GIS Division

Data Accessibility: Publicly Available

Update Frequency: As Needed

Last Revision Date: 2/26/2022

Creation Date: 1/1/1997

Feature Dataset Name: GISMGR.PLANIMETRIC

Layer Name: GISMGR.BUILDINGS