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2 May 2009 Effects of lidar point density on bare earth extraction and DEM creation
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Abstract
Data density has a crucial impact on the accuracy of Digital Elevation Models (DEMs). In this study, DEMs were created from a high point-density LIDAR dataset using the bare earth extraction module in Quick Terrain Modeler. Lower point-density LIDAR collects were simulated by randomly selecting points from the original dataset at a series of decreasing percentages. The DEMs created from the lower resolution datasets are compared to the original DEM. Results show a decrease in DEM accuracy as the resolution of the LIDAR dataset is reduced. Some analysis is made of the types of errors encountered in the lower resolution DEMs. It is also noted that the percentage of points classified as bare earth decreases as the resolution of the LIDAR dataset is reduced.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Angela M. Puetz, R. Chris Olsen, and Brian Anderson "Effects of lidar point density on bare earth extraction and DEM creation", Proc. SPIE 7323, Laser Radar Technology and Applications XIV, 73230I (2 May 2009); https://doi.org/10.1117/12.818186
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