NAME
r.pi.graph.red - Graph Theory - decreasing distance threshold option.
KEYWORDS
raster,
landscape structure analysis,
connectivity analysis
SYNOPSIS
r.pi.graph.red
r.pi.graph.red --help
r.pi.graph.red [-a] input=name output=string keyval=integer distance=float step=float neighborhood=string index=string[,string,...] stats=string [--help] [--verbose] [--quiet] [--ui]
Flags:
- -a
- Set for 8 cell-neighbors. 4 cell-neighbors are default
- --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 of the output ASCII file
- keyval=integer [required]
- Key value
- distance=float [required]
- Distance at which to begin decreasing
- step=float [required]
- Step to decrease the distance
- neighborhood=string [required]
- Neighborhood definition
- Options: nearest_neighbor, relative_neighbor, gabriel, spanning_tree
- index=string[,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
- stats=string [required]
- Statistical method to perform on the values
- Options: average, median, variance, std_deviat, min, max
Graph Theory - decreasing distance threshold option.
...
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.dec,
r.pi.graph.pr,
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.red source code
(history)
Latest change: Tuesday Sep 19 09:59:22 2023 in commit: e76c325998c8cd9053ce012a5adbb79f33ab0779
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual