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How Aerial LiDAR can be used in Surveying, Engineering, Environmental and Infrastructure projects

25 Jun 2019

Did you know that aerial LiDAR can be used to understand ground levels and terrain even if the area is covered by dense vegetation varying from grass/brambles through to mature trees and shrubs.

 

Sometimes it’s not possible to navigate around a site due to heavy vegetation and sometimes a traditional survey is not possible without expensive vegetation clearance. Using aerial LiDAR overcomes these major issues as the data is captured from the air using a drone with a specialised LiDAR unit attached.

 

Aerial LiDAR is an airborne version of terrestrial laser scanning where the system can collect over 700,000 points per second with an average surface density of >700 points per square meter.

 

These three pictures perfectly sum up the invaluable benefits of using aerial LiDAR with the first image showing the dense vegetation (DSM), the second showing the ground only points (DTM) and the third the land itself. Check points are used to quantify the accuracies and we can normally achieve between 50 and 90mm.

 

Aerial LiDAR can be used for forest inventory, floodplain mapping, hydrology, landscape ecology, coastal engineering, landslide monitoring, erosion and deformation monitoring, survey assessments and volumetric calculations.

 

 

 

 

 

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