It is important to monitor unstable slopes to determine where adverse changes in morphology are indicating the likelihood of failure and a consequent risk to life and property. However, where highly unstable slopes need to be monitored, their very nature precludes the use of direct measurement by surveyors and remote means must be used to protect the safety of the survey team. The use of LiDAR (Light Detection and Ranging) enables the accurate location of a network of points that can be used to create a detailed 3D terrain model, or DEM (Digital Elevation Model), of greater coverage and accuracy...
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