Backpack LiDAR survey is the most advanced method of indoor & outdoor Surveying, done using a wearable device, combining state-of-the-art Laser scanning, 360 degrees Panoramic images, Differential Global Positioning System (DGPS), Simultaneous Localization And Mapping (SLAM) technologies, to deliver high precise colourised 3D point cloud data along with camera data, which can be digitised to prepare 3D As-built CAD map or BIM plan of any site (viz. land parcels, gardens, accident spots, factories, plants, buildings, townships, campus, slums, shopping complexes, malls, underground stations, basements, tunnels, bridges etc.) which is under construction or fully built.