GIS and Mapping Services

CONTACT INFORMATION: All public resources of the GIS Division are now available online. For public assistance, inquiries through email are responded to more rapidly than those via phone messages. County staff should utilize the internal Help Desk system for support.
703-324-2712 TTY 711
12000 Government Center Parkway, Suite 117
Fairfax, VA 22035 (please note that access to our office is by appointment only)
Michael Liddle
GIS Program Director

Tree Canopy and Impervious Surface Estimator Released

The GIS and Mapping Services Division has released the Tree Canopy and Impervious Surface Estimator to allow users to calculate coverage areas for these two land cover types. Impervious surfaces are features such as roads, sidewalks, driveways and buildings that prevent water from infiltrating the ground surface. These features generate runoff when it rains and the water travels to storm drains and other low points, contributing to flooding and transporting pollutants. Tree canopy can intercept and reduce stormwater runoff and its coverage is monitored by the county as development occurs. Estimating impervious surface and tree canopy can help stormwater and other planning efforts. The application will be updated as new data becomes available.

Click the image below to use the application. It has also been added to our Infrastructure & Environment application gallery.

Tree Canopy and Impervious Surface Estimator

 

Fairfax Virtual Assistant