LiDAR (Light Detection and Ranging) is a remote sensing technology that uses laser pulses to measure distance, creating a 3D map or point cloud of the environment. It can be used for a variety of applications, such as self-driving cars, aerial mapping, and surveying. In the context of built services, LiDAR can be used to create detailed, accurate models of buildings and other structures, which can be used for architectural design, construction planning, and building maintenance. LiDAR can also be used to detect changes in the built environment over time, such as subsidence or the growth of vegetation on a roof.