A LiDAR as its acronym light detection and ranging, have been taking on more importance in the world of topography, this powerful remote sensing tool works under a simple concept of physics.
The light pulses are emitted by a laser lens, these pulses travel from the sensor to the object to be detected, once it hits the surface of the object, part of the pulse returns to the sensor, In addition to the laser pulse we also have a GPS and an IMU which helps us determine the exact position of the laser at the time it shot the light pulse, in this way it is possible to measure the location where the pulse hit the object.
If we increase the amount of pulses emitted, our result will become a cloud of points that will allow us to see the physical qualities of a terrain, even if the terrain has vegetation, Since the amount of pulses that can be sent can reach up to 1,700,000 pulses, depending on the type and brand of the lens, this guarantees that in terrain with dense vegetation, at least a percentage of those points can cross the vegetation layer and get ground data.
This measurement technique allows us to have a large amount of data that manages to define the terrain profile in a very precise way, but the data alone does not have the precision that we would like to obtain in raw data, to obtain the highest possible accuracy it is necessary to have an additional correction process. This post process allows us to correct the angular errors that have occurred in the trajectory of the sensor, it also allows us to make an adjustment of the GPS position to achieve the highest possible accuracy, with this we can obtain very precise results in a very short time.
Product Development Manager