Lidar (also written LIDAR or LiDAR) is a remote sensing technology that measures distance by illuminating a target with a laser and analyzing the reflected light. Although thought by some to be an acronym of Light Detection And Ranging, the term lidar was actually created as a portmanteau of "light" and "radar." (

Lidar is popularly used as a technology to make high-resolution maps, with applications in geomatics,archaeology, geography, geology, geomorphology, seismology, forestry, remote sensing, atmospheric physics, airborne laser swath mapping (ALSM), laser altimetry, and contour mapping. (


LiDAR projects and data across the state:

In collaboration with STS's Office of GIS Services and The LiDAR Project, it is our pleasure to be able to host the LiDAR. A presentation on the 3DEP Program can provide some background information.
The following are available by County:
Please note: There is a Metadata and extents download folder that has the same data for that project area. This folder will have to be downloaded in addition to the counties needed. It is a very small download. 
Region 2 (seen in map above)Region 1 ( East TN 19 County Collection seen in the map above)
For the 3 DEP data, please note: ​data is provided as individual tiles. we have also provided the grid extents inside each county download folder. This is provided for the user  to overlay with their data and ID only those tiles they need to work with. This is an effort to eliminate the need to work with the whole county at once. The user can simply add the extent tiles layer to ArcMap, overlay their area of interest and then identify only the tiles that intersect. 
Below are the links to QL2 3DEP quality LiDAR that covers the majority of Blount County with the exception or the National Park/Forest. Blount County 2015 DEM. ​Blount County found funding alternative to the statewide 3DEP Program


​Here is the link to the download page for 2 ft. contours.

The purpose is to announce that countywide 2ft contours, generated from the DEMs, are now available.  The download is a zipped ESRI File GeoDatabase.  The Cumberland 27 (with pilot counties project) and West TN NRCS projects are all available now.  We are currently processing the East 19 project and they should all be complete soon.