Using Multiple Ground-based LiDAR Scanners to Digitize Trim Castle in Trim, Ireland

3D laser scanning is becoming more prominent in fields such as autonomous vehicles, forensics, and 3D modeling in architecture, construction, and historic preservation. The research being presented involves the methodology of implementing two Leica 3D laser scanners simultaneously. The fieldwork focused on the digital historic preservation of Trim Castle in Trim, Ireland. A method for using both scanners simultaneously and efficiently was used in which small scan teams were proven to be more efficient. Creating a local grid allows the scanners to share a grid system. To move a scanner within the grid we must create a new station at the next location. Then, the scanner must be able to record the new location by scanning in a target placed at that location. Lastly, the scanner and the target switch position and the scanner will scan the target again to orient itself in the grid system. When using two 3D laser scanners, each scanner has its own set of coordinates in the grid system. Tying both the scanners into a local grid system allows them to share coordinates.