filters.dem

The DEM filter uses a source raster to keep point cloud data within a each cell within a computed range. For example, atmospheric or MTA noise in a scene can be quickly removed by keeping all data within 100m above and 20m below a pre-existing elevation model.

Default Embedded Stage

This stage is enabled by default

Example

[
    {
        "type":"filters.dem",
        "raster":"dem.tif",
        "limits":"Z[20:100]"
    }
]

Options

limits

A range that defines the dimension and the magnitude above and below the value of the given dimension to filter.

For example “Z[20:100]” would keep all Z point cloud values that are within 100 units above and 20 units below the elevation model value at the given X and Y value.

raster
GDAL readable raster data to use for filtering.
band
GDAL Band number to read (count from 1) [Default: 1]