r.li.richness(1)

📦
version 8.4.2 · 8 versions
, in fedora 44

🌸 r.li.richness — the GRASS GIS User's Manual page, but make it make sense 💖

okay bestie, welcome to r.li.richness, one of the lil icons living in the r.li family (the landscape structure analysis crew ✨). She calculates a richness index on a raster map. That's the whole vibe.

KEYWORDS: raster, landscape structure analysis, diversity index 🎀

✨ SYNOPSIS ✨

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

🫶 Flags

  • --overwrite — lets your output files just bulldoze over existing files. chaotic but permitted 💅
  • --help — prints the usage summary, aka the "what do I even type" button
  • --verbose — verbose module output, she will tell you everything 👑
  • --quiet — quiet module output, she will tell you nothing 🤫
  • --ui — force-launches the GUI dialog, main character energy only

🌈 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.richness calculates the "richness diversity index" as:

with:

  • m: number of different patch types

(yeah the formula is just vibes and the letter m, that's what we're working with, no cap 🦋)

🎀 NOTES 🎀

Do not use absolute path names for the config and output file/map parameters. fr fr. just don't.

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 if your input raster map contains only NULL values, then r.li.richness returns 0. that's it, that's the answer, zero, she said what she said 💀

🧚 EXAMPLES 🧚

To calculate the richness diversity 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.richness input=my_map conf=my_conf output=my_out

Forest map (Spearfish sample dataset) example, obsessed with her:

g.region raster=landcover.30m -p
r.mapcalc "forests = if(landcover.30m >= 41 && landcover.30m <= 43,1,null())"
r.li.richness input=forests conf=movwindow7 out=forests_richness_mov7
r.univar forests_richness_mov7

Forest map (North Carolina sample dataset) example, the sequel 🔥:

g.region raster=landclass96 -p
r.mapcalc "forests = if(landclass96 == 5, 1, null() )"
r.li.richness input=forests conf=movwindow7 out=forests_richness_mov7
# verify
r.univar forests_richness_mov7
r.to.vect input=forests output=forests type=area
d.mon wx0
d.rast forests_richness_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 👑

  • Serena Pallecchi, student of Computer Science University of Pisa (Italy).
  • Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)

💻 SOURCE CODE 💻

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

Accessed: Saturday Jan 17 05:40:55 2026

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

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

and that's the whole page bestie — this was r.li.richness(1) from the GRASS 8.4.2 Reference Manual, accessed Saturday Jan 17 05:40:55 2026. go compute some richness, you ate 💅✨🌸

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