Some Critical Issues Review of LiDAR for DEM Generation

doi:10.11924/j.issn.1000-6850.2012-1133

Abstract

Abstract: DEM extraction is one of the key research content about airborne LiDAR technology application. The author analyzed the current use of airborne LiDAR data to extract the DEM study progress from filtering, DEM model selection, interpolation, error control and data compression, and discussed interpolation filtering, slope filtering and morphological filtering algorithms, quantitatively analyzed the performance of the filtering algorithm; simultaneously compared the determining methods and geoscience statistical interpolation method, pointed out that improved the interpolation method accuracy taking into account the stability and order isomorphism; and discussed the DEM grid and triangulation compression method and indicated the need to meet the visualization of the terrain at the same time, improve the compression efficiency. In addition, prospect was also given to provide references for future research.

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