Improvement of Lidar Data Accuracy Using Lidar-Specific Ground Targets
With recent advances of lidar technology, the accuracy potential of lidar data has significantly improved. State-ofthe-art lidar systems can achieve 2 to 3 cm ranging accuracy under ideal conditions, which is the accuracy level required by engineering scale mapping. However, this
is also the accuracy range that cannot be realized by routine navigation-based direct sensor platform orientation. Furthermore, lidar systems are highly integrated multi-sensor systems, and the various components, as well as their spatial relationships, introduce different errors that can
degrade the lidar data accuracy. Even after careful system calibration, including individual sensor calibration and sensors intra-calibration, certain errors in the collected data can still be present. These errors are usually dominated by navigation errors and cannot be totally eliminated
without introducing absolute control information into the lidar data. Therefore, to support applications that require extremely high, engineering scale mapping accuracy, such as transportation corridor mapping, we propose the use of lidar-specific ground targets. Simulations were performed
to determine the most advantageous lidar target design and targets were fabricated based upon the simulation results. To investigate the potential of using control targets for lidar data refinement, test flights were carried out with different flight parameters and target distributions. This
paper provides a description of the optimal lidar target design, the target identification algorithm, and a detailed performance analysis, including the investigation of the achievable lidar data accuracy improvement using lidar-specific ground control targets in the case of various target
distributions and flight parameters.
Document Type: Research Article
Publication date: April 1, 2007
- The official journal of the American Society for Photogrammetry and Remote Sensing - the Imaging and Geospatial Information Society (ASPRS). This highly respected publication covers all facets of photogrammetry and remote sensing methods and technologies.
Founded in 1934, the American Society for Photogrammetry and Remote Sensing (ASPRS) is a scientific association serving over 7,000 professional members around the world. Our mission is to advance knowledge and improve understanding of mapping sciences to promote the responsible applications of photogrammetry, remote sensing, geographic information systems (GIS), and supporting technologies. - Editorial Board
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