This is the command pkfilterdem that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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 ommit 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.
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