Abstract
Based on the Analysis of the characteristics of the point cloud data and the difference compared to other three-dimensional data, explore and study the problem of point cloud data accuracy. From these aspects of the point cloud density, filtering methods and the interpolation method, analysis the elevation accuracy of point cloud data under different categories of terrain. The study method used is in case of different terrain category, different points cloud density and different interpolation methods, using the ground checkpoints of different number, analysis the accuracy of point cloud data. Then use the statistical theory, to estimate the density of Chungking. The final results show that this method can effectively estimate the density of the forest, and has high accuracy.
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