Technological Applications of LIDAR: Flood Studies, Urban Areas, Electric Power Line Maintenance & Engineering Projects (Especially for GATE-Geospatial 2022)

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The main applications in civil engineering in which LiDAR technology is often used are:

A Complete Guide to LiDAR: Light Detection and Ranging
  • Mapping for flood studies: one of the main applications is performing hydrological and flood studies with LiDAR. For this type of work, very accurate measurements of the ground heights are needed. So far, all these works were made by photogrammetry, which entailed high costs and long lead times. LiDAR technology can measure large areas at lower cost and shorter deadlines. Furthermore, it has a height measurement per terrain square meter, whereas in classical photogrammetry, in flat areas, contour lines are plotted widely separated and when interpolating, the DSM would not be so accurate.
  • Applications in urban areas: another main application of LiDAR technology is the measurement of urban areas to plan telecommunication networks, detection of illegal constructions, emergency plans, engineering applications and other GIS applications.
LiDAR Application in Urban Areas
  • Applications in the maintenance of electric power lines: If the LiDAR instrument is installed in a helicopter so that it can fly lower and slower, we can measure electric power lines with greater accuracy, as shown in Figure below.
LiDAR Application in Maintenance of Electric Power …

In this case, the first rebound corresponds to the height of the wires and the last one to the terrain՚s height. In this way, the trees that are dangerously close to cables can be located and, therefore, they must be cleared. Also, illegal constructions, that are closer than the allowed distance, can be detected. Currently, many projects are inventorying power lines so that emergency helicopters (firefighters, emergencies) can fly in an accurate and safer way at night if required by means of this type of mapping.

  • For engineering projects: Mapping for civil engineering projects: roads, railways, etc. For noise maps, inventory, accurate estimation of the Earth՚s movements, 3D visualization and other GIS applications.

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