NAME

       pkfilterdem - Filter digital elevation model raster datasets

SYNOPSIS

       pkfilterdem -i input -o output [options] [advanced options]

DESCRIPTION

       pkfilterdem  can  be  used to filter digital elevation models.  It is typically used after
       the utility pklas2img(1) to create a digital terrain model.  The default filter  operation
       is the progressive morphological filter ⟨http://ieeexplore.ieee.org/xpl/
       login.jsp?tp=&arnumber=1202973&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D1202973⟩
       .

OPTIONS

       -i filename, --input filename
              input image

       -o filename, --output filename
              output classification image

       -f filter, --filter filter
              post   processing  filter:  vito,  etew_min,  promorph  (progressive  morphological
              filter), open, close).

       -dim maxsize, --dim maxsize
              maximum filter kernel size

       -ot type, --otype type
              Data type for output image ({Byte / Int16 / UInt16 / UInt32 /  Int32  /  Float32  /
              Float64 / CInt16 / CInt32 / CFloat32 / CFloat64}).  Empty string: inherit type from
              input image

       -of format, --oformat format
              Output image format (see also gdal_translate(1)).

       -ct colortable, --ct colortable
              color table (file with 5 columns: id R G B ALFA (0: transparent, 255: solid)).  Use
              none to omit color table

       -nodata value, --nodata value
              nodata value

       -v level, --verbose level
              verbose mode if > 0

       Advanced options

       -circ, --circular
              circular disc kernel for dilation and erosion

       -st threshold, --st threshold
              slope  threshold used for morphological filtering.  Use a low values to remove more
              height objects in flat terrains

       -ht threshold, --ht threshold
              initial height threshold for progressive morphological filtering.  Use  low  values
              to  remove  more height objects.  Optionally, a maximum height threshold can be set
              via a second argument (e.g., -ht 0.2 -ht 2.5 sets an initial threshold at 0.2 m and
              caps the threshold at 2.5 m).

       -minchange number, --minchange number
              Stop iterations when no more pixels are changed than this threshold.

SEE ALSO

       pklas2img(1)

                                           27 June 2023                            pkfilterdem(1)