Integration of Building Information Modelling with Geographic Information System for Underground Utility Mapping

The accurate positioning of underground utilities plays a crucial role in managing urban infrastructure, especially in densely populated areas. Traditional 2D CAD drawings often fall short in representing both the depth and precise location of these utilities, which increases the risk of damage during construction and maintenance works. To address this challenge, this study explores the integration of Building Information Modeling (BIM) and Geographic Information Systems (GIS) to improve the mapping of underground utilities and enhance both accuracy and efficiency. The research was conducted at Kuala Terengganu, where data were collected using Unmanned Aerial Vehicles (UAV), Terrestrial Laser Scanning (TLS), Pipe and Cable Locators (PCL), and Ground Penetrating Radar (GPR). These datasets were processed in Autodesk Revit and ArcGIS Pro to generate a georeferenced 3D model of the underground network. The findings demonstrate a significant improvement in the accuracy and interoperability of utility data, enabling more effective analysis and visualization of networks. This approach minimizes manual effort, supports safer excavation, and assists urban planners and managers in making well-informed decisions. Overall, the integration of BIM and GIS strengthens the reliability, efficiency, and sustainability of underground utility mapping, contributing to safer urban development and improved infrastructure management