注意，为点数据指定多个网格级别是没有好处的。
Note that it is never advantageous to specify more than one grid level for point data.
提出了一种基于网格处理的算法实现多传感器数据统一，并使用了间距和立方体两种点数据精简算法。
Present an algorithm based on mesh processing to merge multi-sensor data. Use distance method and cube method to realize point data reduction.
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