filters.ground

The Ground filter passes data through the Point Cloud Library (PCL) ProgressiveMorphologicalFilter algorithm.

ProgressiveMorphologicalFilter is an implementation of the method described in [Zhang2003].

[Zhang2003]Zhang, Keqi, et al. “A progressive morphological filter for removing nonground measurements from airborne LIDAR data.” Geoscience and Remote Sensing, IEEE Transactions on 41.4 (2003): 872-882.

Example

{
  "pipeline":[
    "input.las",
    {
      "type":"filters.ground"
    },
    {
      "type":"writers.las",
      "filename":"output.las"
    }
  ]
}

Options

maxWindowSize
Maximum window size. [Default: 33]
slope
Slope. [Default: 1.0]
max_distance
Maximum distance. [Default: 2.5]
initial_distance
Initial distance. [Default: 0.15]
cell_size
Cell Size. [Default: 1]
classify
Apply classification labels? [Default: true]
extract
Extract ground returns? [Default: false]
approximate
Use approximate algorithm? [Default:: false]