Ling Kit Kong

Date of Award


Degree Name

Master of Science in Engineering


Civil and Construction Engineering

First Advisor

Dr. Upul Attanayake

Second Advisor

Dr. Xiaoyun Shao

Third Advisor

Dr. Diana Prieto

Access Setting

Masters Thesis-Abstract Only

Restricted to Campus until



3D laser scanning is a non-contact imaging technology that can rapidly capture a surface of an object and produce a point cloud representation of that surface. For the purpose of bridge condition assessment, the 3D laser scanner is capable of capturing a global scan of a bridge. With the point cloud data, a 3D CAD model of the bridge can be obtained representing the in-service conditions. Properly developed CAD models can be used for developing structural models and documenting condition data. However, accurate CAD models heavily depend on the level of accuracy of the scan data collected under field conditions. Hence, it is a timely need to understand the level of accuracy that the laser scan data provides under field conditions. This thesis focuses on: 1) Developing a process for evaluating point cloud data accuracy; 2) Evaluating the accuracy of point cloud data acquired from a Leica CIO scanner under field conditions; and 3) Developing recommendations for capturing structural details under field conditions.