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.graph.dec - Graph Theory - successive criteria-based deletion of patches.
KEYWORDS
raster
SYNOPSIS
r.pi.graph.dec
r.pi.graph.dec --help
r.pi.graph.dec [-al] input=name [id=string] output=string keyval=integer distance=float neighborhood=string index=string choice=string [seed=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -a
- Set for 8 cell-neighbors. 4 cell-neighbors are default
- -l
- Set to perform deletion for the whole landscape rather than cluster-wise
- --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
- id=string
- Base name for the ID raster files
- output=string [required]
- Name of the output ASCII file
- keyval=integer [required]
- Key value
- distance=float [required]
- Bounding distance [0 for maximum distance]
- neighborhood=string [required]
- Neighborhood definition
- Options: nearest_neighbor, relative_neighbor, gabriel, spanning_tree
- index=string [required]
- Cluster index
- Options: connectance_index, gyration_radius, cohesion_index, percent_patches, percent_area, number_patches, number_links, mean_patch_size, largest_patch_size, largest_patch_diameter, graph_diameter
- choice=string [required]
- Cluster index
- Options: smallest_first, biggest_first, random, link_min, link_max
- seed=integer
- Seed for the random number generation
Graph Theory - successive criteria-based deletion of patches.
...
An example for the North Carolina sample dataset:
r.pi.corearea,
r.pi.corr.mw,
r.pi.csr.mw,
r.pi.export,
r.pi.graph,
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.graph.dec 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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GRASS Development Team,
GRASS GIS 7.8.8dev Reference Manual