24-hour Hotline 2926 4111

Unmanned Aerial Vehicle (UAV)

We introduced the UAV technology in 2017 and it was first deployed in taking 360° panorama photos and videos for project planning. The use of UAV is now expanded to various applications such as urgent record surveys, inspections of bridge condition, etc., to facilitate road safety and maintenance.

Video: UAV Application in Inspection of Bridge Structures

Landslide survey
UAV was deployed in an urgent survey of the extent of landslide at downward slope to the South of Peel Rise on Hong Kong Island in 2019. Vertical aerial photographs were taken for forming a point cloud and a 3D mesh model with high positional accuracy. The surface area of the site was successfully measured within 2 working days to facilitate subsequent repair works.

  • Part of the Soffit of Ting Kau Bridge
    Part of the Soffit of Ting Kau Bridge

Visual inspection of highway structures

Another typical UAV application is to assist in visual inspection of highway structures such as bridges. UAV survey was conducted to create a detailed image record of the soffit condition of Kap Shui Mun Bridge and Ting Kau Bridge in 2017 and 2019 respectively. True scale orthophoto and 3D mesh model were created from over 1800 photographs on which simple measurements could be taken. The use of UAV enables detailed inspection of structures with accessibility constraints.