r.li.padrange(1)

📦
version 8.4.2 · 8 versions
, in fedora 44

💖 r.li.padrange 💖

okay bestie, welcome to the GRASS GIS User's Manual entry for r.li.padrange — she's a raster girlie and she's here to spill the tea on patch areas. 🎀

✨ NAME ✨

r.li.padrange — Calculates range of patch area size on a raster map 🌸

🔑 KEYWORDS 🔑

raster, landscape structure analysis, patch index

🌈 SYNOPSIS 🌈

r.li.padrange
r.li.padrange --help
r.li.padrange input=name config=name output=name  [--overwrite]
[--help]  [--verbose]  [--quiet]  [--ui]

🚩 Flags 🚩

  • --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
  • config=name [required] — Configuration file
  • output=name [required] — Name for output raster map

💅 DESCRIPTION 💅

r.li.padrange calculates the range of patch area sizes in hectares as:

with:

  • amax: max patch area size
  • amin: min patch area size

ngl this index is calculated using a 4 neighbour algorithm — diagonal cells are literally ignored when tracing a patch. no cap. 🙈

📝 NOTES 📝

Do not use absolute path names for the config and output file/map parameters. 🚫

If the "moving window" method was selected in g.gui.rlisetup, then the output will be a raster map, otherwise an ASCII file will be generated in the folder:

  • C:\Users\userxy\AppData\Roaming\GRASS8\r.li\output\ (MS-Windows)
  • $HOME/.grass8/r.li/output/ (GNU/Linux)

If the sample area contains only NULL values then r.li.padrange returns NULL. 💀

🧚 EXAMPLES 🧚

To calculate range of patch area size index on map my_map, using my_conf configuration file (previously defined with g.gui.rlisetup) and saving results in my_out, run:

r.li.padrange input=my_map conf=my_conf output=my_out

Forest map (Spearfish sample dataset) example: 🌲

g.region raster=landcover.30m -p
r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
r.li.padrange input=forests conf=movwindow7 out=forests_padrange_mov7
r.univar forests_padrange_mov7

Forest map (North Carolina sample dataset) example: 🌳

g.region raster=landclass96 -p
r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
r.li.padrange input=forests conf=movwindow7 out=forests_padrange_mov7
# verify
r.univar forests_padrange_mov7
r.to.vect input=forests output=forests type=area
d.mon wx0
d.rast forests_padrange_mov7
d.vect forests type=boundary

👀 SEE ALSO 👀

r.li - package overview, g.gui.rlisetup

📚 REFERENCES 📚

McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern analysis program for quantifying landscape structure. USDA For. Serv. Gen. Tech. Rep. PNW-351. (PDF)

👑 AUTHORS 👑

  • Michael Shapiro - CERL (patch identification)
  • Markus Metz (statistics)

⭐ SOURCE CODE ⭐

Available at: r.li.padrange source code (history)

Accessed: Saturday Jan 17 05:40:54 2026

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© 2003-2025 GRASS Development Team, GRASS GIS 8.4.2 Reference Manual

and that's the whole page bestie — brought to you by GRASS 8.4.2, manual page r.li.padrange(1), last touched Saturday Jan 17 05:40:54 2026. slay, go trace some patches. 💖✨🦋

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