pkfilterdem

pkfilterdem

Filter digital elevation model raster datasets

SYNOPSIS

Usage: pkfilterdem -i input.txt -o output

Options: [-f filter] [-dim maxsize]

Advanced options: [-ot type] [-of format] [-ct colortable] [-nodata value] [-circ] [-st threshold] [-ht threshold] [-minchange value]

Description

The utility pkfilterdem can be used to filter digital elevation models. It is typically used after the utility pklas2img to create a digital terrain model. The default filter operation is the progressive morphological filter.

Options

• use either -short or --long options (both --long=value and --long value are supported)
• short option -h shows basic options only, long option --help shows all options

  short	long	type	default	description
  i	input	std::string		input image file
  o	output	std::string		Output image file
  f	filter	std::string		post processing filter: vito, etew_min, promorph (progressive morphological filter),open,close).
  dim	dim	double	17	maximum filter kernel size
  circ	circular	bool	false	circular disc kernel for dilation and erosion
  st	st	double	0	slope threshold used for morphological filtering. Use a low values to remove more height objects in flat terrains
  ht	ht	double	0.2	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	minchange	short	0	Stop iterations when no more pixels are changed than this threshold.
  ot	otype	std::string		Data type for output image ({Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/CInt16/CInt32/CFloat32/CFloat64}). Empty string: inherit type from input image
  of	oformat	std::string		Output image format (see also gdal_translate). Empty string: inherit from input image
  ct	ct	std::string		color table (file with 5 columns: id R G B ALFA (0: transparent, 255: solid). Use none to ommit color table
  nodata	nodata	short		nodata value

  Usage: pkfilterdem -i input.txt -o output