r.li.padrange(1grass)

💖 r.li.padrange 💖

okay bestie, gather round, because today we're meeting r.li.padrange from the GRASS User's Manual family — she calculates the range of patch area size on a raster map, and honestly? she eats. 🍓

✨ NAME ✨

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

🎀 KEYWORDS 🎀

raster, landscape structure analysis, patch index

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💅 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 (she's brave like that, no cap)
• --help — Print usage summary
• --verbose — Verbose module output
• --quiet — Quiet module output (shh 🤫)
• --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

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👑 DESCRIPTION 👑

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

with:

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

This index is calculated using a 4 neighbour algorithm — and the way that diagonal cells are ignored when tracing a patch? iconic. literally she just doesn't look at them. periodt. ✨

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🫶 NOTES 🫶

🚨 bestie do NOT use absolute path names for the config and output file/map parameters. fr fr.

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) or $HOME/.grass8/r.li/output/ (GNU/Linux).

And lowkey important: if the sample area contains only NULL values then r.li.padrange returns NULL. that's it, that's the answer, nothing to see here 💀

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🔥 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

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🧚 SEE ALSO 🧚

• r.li (package overview)
• g.gui.rlisetup

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⭐ 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)

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🌟 AUTHORS 🌟

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

main character credits, honestly 🫡

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💜 SOURCE CODE 💜

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

Latest change: Friday Apr 17 01:04:26 2026 in commit: 32a143358df26b2e518b03c7e0d79541e8d1e5b1

Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

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and that's the whole vibe check, bestie 💖 this page is living its best life as part of the © 2003-2026 GRASS Development Team, GRASS 8.5.0 Reference Manual — and under the hood it's GRASS 8.5.0 tagging along as r.li.padrange(1grass) 🎀 slay, go map something. 🌸✨