docker run -v /c/Users/Howard/PDAL:/data -t pdal/pdal \
       pdal translate \
       /data/exercises/analysis/ground/CSite1_orig-utm.laz \
       -o /data/exercises/analysis/ground/denoised-ground-only.laz \
       outlier pmf \
       --filters.outlier.method="statistical" \
       --filters.outlier.mean_k=8 \
       --filters.outlier.multiplier=3.0 \
       --filters.pmf.cell_size=1.5 \
       --filters.pmf.extract=true \
       --writers.las.compression=true --verbose 4
