Introduction to the documentation process The main objective of the documentation process is to conduct an architectural and condition assessment of SimonArzt Building. To ensure the precision of the restoration and development process, a very accurate and detailed information must be acquired throughout the documentation. Initially, a basic survey has been done using traditional surveying tools (e.g. total station and distance meters). The outcome wasn’t satisfactory or accurate enough. Also, it didn’t provide enough imagery or detailing but it has set the base line for the next step. We investigated the more advanced techniques that can produce the desired outcome. Two main options proved their reliability: Photogrammetry and LiDAR (i.e. Laser Scanning). •PHOTOGRAMMETRY: A technique based on extracting 3D information from photographs. The process involves taking overlapping photographs of an object, structure, or space, and converting them into 2D or 3D digital models. • LiDAR: a surveying method that measures distance to a target by illuminating the target with laser light and measuring the reflected light with a sensor. Differences in laser return times and wavelengths can then be used to make 08
digital 3D representations of the target. The beforementioned techniques has been evaluated with their pros and cons in mind until a final decision was taken: Photogrammetry requires an extraordinary amount of work to cover every detail in the building. Some parts also required a flying drone to capture the unreachable areas which was legally unacceptable. While Photogrammetry offered a great imaging quality, it wasn’t a reliable option for the documentation process. On the other hand, laser scanning appeared to be a more suitable option for its accuracy, productivity and fair imaging quality. We collaborated with PortSaid Universit’s faculty of engineering to provide us with required equipment and experts to carry on the Laser Scanning process. The faculty provided a Leica ScanStation P40 and the team responsible for the process. The process led by Dr. Ahmed ElSharkawy lasted for a week including planning phase and actual scanning process.
