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 morpho‐
       logical filter ⟨http://ieeexplore.ieee.org/xpl/
       login.jsp?tp=&arnumber=1202973&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnum‐
       ber%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)

                                                09 December 2021                                  pkfilterdem(1)