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Assessment of Relative Accuracy of AHN-2 Laser Scanning Data Using Planar Features
Optical and Laser Remote Sensing, Department of Remote Sensing, Delft University of Technology, Kluyverweg 1, 2629HS Delft, The Netherlands
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Received: 20 July 2010; in revised form: 19 August 2010 / Accepted: 20 August 2010 / Published: 1 September 2010
Abstract: AHN-2 is the second part of the Actueel Hoogtebestand Nederland project, which concerns the acquisition of high-resolution altimetry data over the entire Netherlands using airborne laser scanning. The accuracy assessment of laser altimetry data usually relies on comparing corresponding tie elements, often points or lines, in the overlapping strips. This paper proposes a new approach to strip adjustment and accuracy assessment of AHN-2 data by using planar features. In the proposed approach a transformation is estimated between two overlapping strips by minimizing the distances between points in one strip and their corresponding planes in the other. The planes and the corresponding points are extracted in an automated segmentation process. The point-to-plane distances are used as observables in an estimation model, whereby the parameters of a transformation between the two strips and their associated quality measures are estimated. We demonstrate the performance of the method for the accuracy assessment of the AHN-2 dataset over Zeeland province of The Netherlands. The results show vertical offsets of up to 4 cm between the overlapping strips, and horizontal offsets ranging from 2 cm to 34 cm.
Keywords: Airborne Laser Scanning; altimetry; accuracy assessment; strip adjustment; planar features; least-squares estimation
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Sande, C.; Soudarissanane, S.; Khoshelham, K. Assessment of Relative Accuracy of AHN-2 Laser Scanning Data Using Planar Features. Sensors 2010, 10, 8198-8214.
Sande C, Soudarissanane S, Khoshelham K. Assessment of Relative Accuracy of AHN-2 Laser Scanning Data Using Planar Features. Sensors. 2010; 10(9):8198-8214.
Sande, Corné van der; Soudarissanane, Sylvie; Khoshelham, Kourosh. 2010. "Assessment of Relative Accuracy of AHN-2 Laser Scanning Data Using Planar Features." Sensors 10, no. 9: 8198-8214.