pkfilterdem - Filter digital elevation model raster datasets
pkfilterdem
-i input -o output [options] [advanced
options]
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
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.
- -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.