r.pi.graph.dec

Graph Theory - successive criteria-based deletion of patches.

r.pi.graph.dec [-al] input=name [id=string] output=string keyval=integer distance=float neighborhood=string index=string choice=string [seed=integer] [--overwrite] [--verbose] [--quiet] [--qq] [--ui]

Example:

r.pi.graph.dec input=name output=string keyval=integer distance=float neighborhood=string index=string choice=string

grass.script.run_command("r.pi.graph.dec", input, id=None, output, keyval, distance, neighborhood, index, choice, seed=None, flags=None, overwrite=False, verbose=False, quiet=False, superquiet=False)

Example:

gs.run_command("r.pi.graph.dec", input="name", output="string", keyval=integer, distance=float, neighborhood="string", index="string", choice="string")

Parameters

Command linePython (grass.script)

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
    Allowed values: nearest_neighbor, relative_neighbor, gabriel, spanning_tree
index=string [required]
    Cluster index
    Allowed values: 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
    Allowed values: smallest_first, biggest_first, random, link_min, link_max
seed=integer
    Seed for the random number generation
-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
--qq
    Very quiet module output
--ui
    Force launching GUI dialog

input : str, required
    Name of input raster map
    Used as: input, raster, name
id : str, optional
    Base name for the ID raster files
    Used as: output, raster
output : str, required
    Name of the output ASCII file
    Used as: output
keyval : int, required
    Key value
distance : float, required
    Bounding distance [0 for maximum distance]
neighborhood : str, required
    Neighborhood definition
    Allowed values: nearest_neighbor, relative_neighbor, gabriel, spanning_tree
index : str, required
    Cluster index
    Allowed values: 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 : str, required
    Cluster index
    Allowed values: smallest_first, biggest_first, random, link_min, link_max
seed : int, optional
    Seed for the random number generation
flags : str, optional
    Allowed values: a, l
    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: bool, optional
    Allow output files to overwrite existing files
    Default: False
verbose: bool, optional
    Verbose module output
    Default: False
quiet: bool, optional
    Quiet module output
    Default: False
superquiet: bool, optional
    Very quiet module output
    Default: False

DESCRIPTION

Graph Theory - successive criteria-based deletion of patches.

NOTES

...

EXAMPLE

An example for the North Carolina sample dataset:

g.region -d
...

AUTHORS

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: Thursday Feb 20 13:02:26 2025 in commit 53de819