Dynamic laser scanning systems have become an essential part of the survey and documentation toolbox thanks to benefits such as faster workflows, easy capture of panoramic imagery, photorealistic point clouds, and automated processing.
But there is still one major roadblock to wider adoption: The 3D-capture industry has not established a standardized method for estimating or verifying the accuracy of a dynamic laser scanning systems system. As such, professionals who require high-accuracy deliverables can find it challenging to trust stated accuracy specifications – making it difficult to know whether a mobile mapping system is appropriate for their current project.
In this document, NavVis will address this problem by demonstrating a rigorous, reliable, and survey-based method for verifying the accuracy of point clouds produced by a dynamic laser scanning system.
We use the NavVis VLX 3 scanner for our benchmarking, but the method is repeatable and could be used to establish the accuracy — and trustworthiness — of any measurement device, including total stations, terrestrial scanners, and SLAM-based dynamic laser scanning systems.
For surveyors or other professionals who rely on high-accuracy instruments, it is crucial to estimate and verify the accuracy of the instrument’s real-world measurements.
With a dynamic laser scanning system, this task is challenging. Estimating the accuracy of a device in a specific environment requires significant experience, and verifying the result is much more complex than with other devices.
This section will demonstrate the extent of this challenge.
To do so, we will explain how to estimate and verify the measurement accuracy of three instruments, in order of increasing difficulty: total station, static terrestrial laser scanner (TLS), and dynamic laser scanning system.
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