Accuracy assessment of LiDAR elevation data using survey marks

Liu, Xiaoye (2011) Accuracy assessment of LiDAR elevation data using survey marks. Survey Review, 43 (319). pp. 80-93. ISSN 0039-6265

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Airborne LiDAR has become the preferred technology for digital elevation data acquisition in a wide range of applications. The vertical accuracy with respect to a specified vertical datum is the principal criterion in specifying the quality of LiDAR elevation data. The quantitative assessment of LiDAR elevation data is usually conducted by comparing high-accuracy checkpoints with elevations estimated from the LiDAR ground data. However, the collection of a sufficient number of checkpoints by field surveying is a time-consuming task. This study used survey marks to assess the vertical accuracy of LiDAR data for different land covers in a rural area and explored the performance of different methods for deriving elevations from LiDAR data corresponding to the locations of heckpoints. Normality tests using both frequency histograms and quantile-quantile plots were performed for vertical differences between the LiDAR data and the checkpoints, so the appropriate measures (the formula 1.96×RMSE or the 95th percentile) can be used for the vertical accuracy ssessment of the LiDAR data for different land covers. The results demonstrated the suitability of using survey marks as checkpoints for the assessment of the vertical accuracy of LiDAR data.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: The PDF cannot be used for commercial purposes, but may be posted on Authors' individual websites or that of their institution.... For ease of dissemination and to ensure proper policing of use, papers and contributions become the legal copyright of the publisher unless otherwise agreed.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 08 Feb 2011 23:00
Last Modified: 19 Aug 2014 06:31
Uncontrolled Keywords: LiDAR; airborne laser scanning; digital elevation model; survey mark; accuracy assessment
Fields of Research : 09 Engineering > 0909 Geomatic Engineering > 090903 Geospatial Information Systems
09 Engineering > 0909 Geomatic Engineering > 090905 Photogrammetry and Remote Sensing
02 Physical Sciences > 0205 Optical Physics > 020502 Lasers and Quantum Electronics
Socio-Economic Objective: D Environment > 96 Environment > 9606 Environmental and Natural Resource Evaluation > 960606 Rights to Environmental and Natural Resources (excl. Water Allocation)
Identification Number or DOI: 10.1179/003962611X12894696204704

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