Lidar - Light Detection and Ranging, is a remote sensing technique that utilizes light in the form of a rapidly pulsed laser to measure return distances from the Earth captured by a sensor at the source of the pulse. These combined pulse return measurements with additional spatial and temproral data recorded by the acquisition system(airborne or terrestial) produce a three-dimensional(3-D), detailed representation of the shape of the Earth illuminating its surface characteristics.
Lidar goes beyond traditional bare earth digital elevation models (DEMs) by producing point cloud information that can be classified into existing features such as vegetation and man-made structures.
Historically, TNRIS acquired data through the now defunct High Priority Imagery and Data Sets (HPIDS) contract.
Lidar coverage varies across the state. Lidar coverage and project details (date, nominal point spacing, vendor, etc.) can be found on the Lidar Status Map. All details about each dataset in our collection can be found in the supplemental reports for each project.
You can download a complete index of all available lidar data at TNRIS.
All lidar datasets are available at reproduction cost through our Research and Distribution center. They can be obtained by visiting the DataHub.