LiDAR is an acronym for Light Detection And Ranging, sometimes also referred to as Laser Altimetry or Airborne Laser Terrain Mapping (ALTM). The LiDAR system basically consists of integration of three technologies, namely, Inertial Navigation System (INS), LASER, and GPS. The Global Positioning System (GPS) has been fully operational for over a decade, and during this period, the technology has proved its potential in various application areas. Some of the important applications of GPS are crustal deformation studies, vehicle guidance systems, and more recently, in LiDAR.
Geo Spatial Information is an important input for all planning and developmental activities especially in the present era of digital mapping and decision support systems. LiDAR is much faster than conventional photogrammetric technology and offers distinct advantage over photogrammetry in some application areas.