Effects of lidar point density on bare earth extraction and DEM creation

Angela M. Puetz; R. Chris Olsen; Brian Anderson

doi:10.1117/12.818186

2 May 2009 Effects of lidar point density on bare earth extraction and DEM creation

Angela M. Puetz, R. Chris Olsen, Brian Anderson

Proceedings Volume 7323, Laser Radar Technology and Applications XIV; 73230I (2009) https://doi.org/10.1117/12.818186
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

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.

Citation Download Citation

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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