Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.
NAME
r.pi.export - Export of patch based information.
KEYWORDS
raster
SYNOPSIS
r.pi.export
r.pi.export --help
r.pi.export [-a] input=name output=string [values=string] [id_raster=string] [patch_raster=string] stats=string[,string,...] [title="phrase"] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -a
- Set for 8 cell-neighbors. 4 cell-neighbors are default
- --overwrite
- Allow output files to overwrite existing files
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- input=name [required]
- Name of input raster map
- output=string [required]
- Name for the output ASCII-file
- values=string
- Name for the output ASCII-file with patch values
- id_raster=string
- Name for the ID raster map
- patch_raster=string
- Name for the patch raster map
- stats=string[,string,...] [required]
- Statistical method to perform on the values
- Options: average, variance, standard deviation, median, min, max
- title="phrase"
- Title for resultant raster map
This module exports raster patch values (no single pixels, but single
individual patch values), which can be used for subsequent analysis in
R and later import into GRASS again, using
r.pi.import.
This module...
An example for the North Carolina sample dataset:
generating a patch index map for later export:
r.pi.index input=landclass96 output=landclass96_forestclass5_area keyval=5 method=area
export this resulting map:
r.pi.export input=landclass96_forestclass5_area output=patch_area_out values=patch_area_values id_raster=forestclass5_ID stats=average,variance,min
various resulting files are generated:
patch_area_out: a text file with the
average,
variance and
minimum statistics as defined above and
additionally informaton about the percentage coverage
(
landcover) and the number of fragments (
number) of
the analysed landcover.
patch_area_values: a text file with the actual patch values
not the statistics. The first column is providing the corresponding
patch ID, which is also existing in the
forestclass5_ID raster
map (here:0-878). The second column is providing the percentage cover
of each patch (sum is equal the overall coverage: 0.506). The third
column is holding the actual patch index value (here area; e.g. patch
0: 12).
r.pi.corearea,
r.pi.corr.mw,
r.pi.csr.mw,
r.pi.graph,
r.pi.graph.dec,
r.pi.graph.pr,
r.pi.graph.red,
r.pi.grow,
r.pi.import,
r.pi.index,
r.pi.lm,
r.pi.odc,
r.pi.prob.mw,
r.pi.rectangle,
r.pi
Programming: Elshad Shirinov
Scientific concept: Dr. Martin Wegmann
Department of Remote Sensing
Remote Sensing and Biodiversity Unit
University of Wuerzburg, Germany
Port to GRASS GIS 7: Markus Metz
SOURCE CODE
Available at:
r.pi.export source code
(history)
Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55
Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.
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© 2003-2023
GRASS Development Team,
GRASS GIS 7.8.8dev Reference Manual