LIDAR measures the distance from the sensor to the object by determining the time between the release of laser pulse to receiving of the reflected pulse. For terrestrial uses LIDAR uses near infrared laser (900– 1064 nanometers) and water penetration green light (532 nanometers) for the water measurement. Nowadays LIDAR is used everywhere, we have collected 5 most important applications.
Digital Elevation Model (DEM)
DEM stands for digital elevation model which has z coordinates value along with x and y. Elevation values are used everywhere, in roads, building, bridge and other. It has made easy to capture the surface height. Before LIDAR, ground survey or photogrammetry method was used to capture the z coordinates but the problem with this method was time consuming. LIDAR has made things easier and quicker.
LIDAR helps the farmer to find the area that uses costly fertilizer. LIDAR can be used to create elevation map of the farmland that can be converted to create slope and sunlight exposure area map.
Forest Planning and Management
LIDAR is widely used in the forest industry to plan and mange. Other uses of the LIDAR in the forest industry are the measurement of the peak height to estimate its root expansion.
Micro topography data generated from the LIDAR data is used in the environment assessment. Remote sensing and surface information (LIDAR) is used to find the area that is affected by the human activities.
LIDAR is used to create high resolution and accurate surface model of the river. These extracted LIDAR information can be used for the 3D simulation for better planning of the structures or buildings on the river bank.
LIDAR data for road helps engineer to understand it and give a roadmap for the building it. Road engineer use LIDAR data for below things:
- – Calculate Cut & fill, culvert sizing, vegetation removal, grade calculations and more.
- – Height clearances
- – Of way and surface conditions