Chandigarh: The UT Administration is all set to conduct the real-time aerial photography of the city using the Light Imaging Detection and Ranging (LiDAR) technology. The UT opened the tenders on Monday after which some of the interested companies gave presentations.
The presentations were witnessed by Adviser Parimal Rai, DC Ajit Balaji Joshi, Chief Engineer Mukesh Anand, Chief Architect Kapil Setia, MC Chief Engineer N P Sharma, MC Joint Commissioner Manoj Khatri and AETC Rakesh Popli at the UT Secretariat.
Mukesh Anand said, “We have witnessed presentations on LiDAR technology with which we will take real-time photography of the city buildings and other infrastructure through an airplane and surface vehicles. This will help in detecting the violations in the form of buildings, houses, roads and other such structures. It is a technology using light to detect the structures from air as well as from surface.”
The company in its presentation had explained the methodology adopted by LiDAR system and the results of some previous real-time photography of the buildings, said Anand.
Anand added that LiDAR has a wide range of applications which could be divided into airborne and terrestrial types.
Airborne LiDAR is when a laser scanner, while attached to a plane during flight, creates a 3D point cloud model of the landscape. This is currently the most detailed and accurate method of creating digital elevation models, replacing photogrammetry. One major advantage in comparison with photogrammetry is the ability to filter out reflections from vegetation from the point cloud model to create a digital surface model which represents ground surfaces such as rivers, paths, cultural heritage sites, etc., which are concealed by trees.
Within the category of airborne LiDAR, there is sometimes a distinction made between high-altitude and low-altitude applications, but the main difference is a reduction in both accuracy and point density of data acquired at higher altitudes. Airborne LiDAR can also be used to create bathymetric models in shallow water.
What is LiDAR technology
LiDAR (also called LIDAR and LADAR) is a surveying method that measures distance to a target by illuminating that target with a laser light. The name LiDAR, is an acronym of Light Imaging Detection and Ranging, was originally a portmanteau of light and radar. LiDAR is popularly used to make high-resolution maps, with applications in geodesy, geomatics, archaeology, geography, geology, geomorphology, seismology, forestry, atmospheric physics, laser guidance, airborne laser swath mapping (ALSM), and laser altimetry. LiDAR is also called laser scanning and 3D scanning, with terrestrial, airborne and mobile applications.
An overview of Chandigarh roads.
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