Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current 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: Monday Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55
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© 2003-2023
GRASS Development Team,
GRASS GIS 7.8.9dev Reference Manual