Unmanned aerial vehicle-based as-built surveys of buildings

摘要: Camera-equipped Unmanned Aerial Vehicles (UAVs) are effective tools for as-built building surveys. Through a systematic literature review, we synthesized and categorized factors affecting the quality of UAV-based reconstructed scenes and their associated performance evaluation metrics (e.g., accuracy and time efficiency). Their interrelationships were analyzed by Social Network Analysis (SNA) to identify critical factors and their impacts. We further quantitatively evaluated these factors and metrics through controlled experiments with a camera-equipped UAV and a Terrestrial Laser Scanner for an institutional building. Various flight paths, photo overlaps, and distances to the building were tested to evaluate their impact on dimensional accuracy, time efficiency, and point cloud density. We demonstrated the trade-offs between the influential factors to provide insights into parameter selection. Additionally, a data …