t.rast.colors(1)

📦
version 8.4.2 · 8 versions
, in fedora 44

💖 t.rast.colors — the manual page, but make it make sense 💖

okay bestie, gather round, because this one is literally the glow-up artist for your space time raster dataset. It's t.rast.colors(1), from the GRASS GIS User's Manual, and no cap, it's giving ✨temporal color table chaos✨ in the best way.

🌸 NAME 🌸

t.rast.colors — creates and/or modifies the color table that's chillin' with each raster map of a space time raster dataset. Yeah. Every single one. 💅

🎀 KEYWORDS 🎀

temporal, color table, raster, time — iykyk 🦋

✨ SYNOPSIS ✨

t.rast.colors
t.rast.colors --help
t.rast.colors [-rwlngae] input=name  [color=style]   [raster=name]
[raster_3d=name]   [rules=name]   [--help]  [--verbose]  [--quiet]
[--ui]

🚩 Flags 🚩

  • -r — Remove existing color table. bye bye, old vibes 👋
  • -w — Only write new color table if it does not already exist. shy queen behavior, only speaks when there's room 🫶
  • -l — List available rules then exit. window shopping, no commitment 🌈
  • -n — Invert colors. negative of the negative, iconic 💀
  • -g — Logarithmic scaling 📈
  • -a — Logarithmic-absolute scaling 📈✨
  • -e — Histogram equalization. glow-up via redistribution 🧚
  • --help — Print usage summary. the "wait what does this do again" button 💖
  • --verbose — Verbose module output. she's a talker 🗣️
  • --quiet — Quiet module output. she's mysterious 🤫
  • --ui — Force launching GUI dialog. for the visual girlies 🎀

🦋 Parameters 🦋

  • input=name [required] — Name of the input space time raster dataset. this is the main character, you must name her 👑
  • color=style — Name of color table (see r.color help).

Options: aspect, aspectcolr, bcyr, bgyr, blues, byg, byr, celsius, corine, curvature, differences, elevation, etopo2, evi, fahrenheit, forest_cover, gdd, grass, greens, grey, grey.eq, grey.log, grey1.0, grey255, gyr, haxby, inferno, kelvin, magma, ndvi, ndwi, nlcd, oranges, plasma, population, population_dens, precipitation, precipitation_daily, precipitation_monthly, rainbow, ramp, random, reds, roygbiv, rstcurv, ryb, ryg, sepia, slope, soilmoisture, srtm, srtm_percent, srtm_plus, terrain, viridis, water, wave

and here's the tea on every single one of them, with ranges preserved exactly 💅

  • aspect: aspect oriented grey colors [range: map values]
  • aspectcolr: aspect oriented rainbow colors [range: 0 to 360]
  • bcyr: blue through cyan through yellow to red [range: map values]
  • bgyr: blue through green through yellow to red [range: map values]
  • blues: white to blue [range: map values]
  • byg: blue through yellow to green [range: map values]
  • byr: blue through yellow to red [range: map values]
  • celsius: blue to red for degree Celsius temperature [range: -80 to 80]
  • corine: EU Corine land cover colors [range: 111 to 995]
  • curvature: for terrain curvatures (from v.surf.rst and r.slope.aspect) [range: map values]
  • differences: differences oriented colors [range: map values]
  • elevation: maps relative ranges of raster values to elevation color ramp [range: map values]
  • etopo2: colors for ETOPO2 worldwide bathymetry/topography [range: -11000 to 8850]
  • evi: enhanced vegetative index colors [range: -1 to 1]
  • fahrenheit: blue to red for Fahrenheit temperature [range: -112 to 176]
  • forest_cover: percentage of forest cover [range: 0 to 100]
  • gdd: accumulated growing degree days [range: 0 to 6000]
  • grass: GRASS GIS green (perceptually uniform) [range: map values]
  • greens: white to green [range: map values]
  • grey: grey scale [range: map values]
  • grey.eq: histogram-equalized grey scale [range: map values]
  • grey.log: histogram logarithmic transformed grey scale [range: map values]
  • grey1.0: grey scale for raster values between 0.0-1.0 [range: 0 to 1]
  • grey255: grey scale for raster values between 0-255 [range: 0 to 255]
  • gyr: green through yellow to red [range: map values]
  • haxby: relative colors for bathymetry or topography [range: map values]
  • inferno: perceptually uniform sequential color table inferno [range: map values]
  • kelvin: blue to red for temperature in Kelvin scale [range: 193.15 to 353.15]
  • magma: perceptually uniform sequential color table magma [range: map values]
  • ndvi: Normalized Difference Vegetation Index colors [range: -1 to 1]
  • ndwi: Normalized Difference Water Index colors [range: -200 to 200]
  • nlcd: US National Land Cover Dataset colors [range: 0 to 95]
  • oranges: white to orange [range: map values]
  • plasma: perceptually uniform sequential color table plasma [range: map values]
  • population: color table covering human population classification breaks [range: 0 to 2e+09]
  • population_dens: color table covering human population density classification breaks [range: 0 to 1e+09]
  • precipitation: precipitation color table (0..2000mm) [range: 0 to 7000]
  • precipitation_daily: precipitation color table (0..1000mm) [range: 0 to 10000]
  • precipitation_monthly: precipitation color table (0..1000mm) [range: 0 to 1000]
  • rainbow: rainbow color table [range: map values]
  • ramp: color ramp [range: map values]
  • random: random color table [range: map values]
  • reds: white to red [range: map values]
  • roygbiv: [range: map values]
  • rstcurv: terrain curvature (from r.resamp.rst) [range: map values]
  • ryb: red through yellow to blue [range: map values]
  • ryg: red through yellow to green [range: map values]
  • sepia: yellowish-brown through to white [range: map values]
  • slope: r.slope.aspect-type slope colors for raster values 0-90 [range: 0 to 90]
  • soilmoisture: soilmoisture color table (0.0-1.0) [range: 0 to 1]
  • srtm: color palette for Shuttle Radar Topography Mission elevation [range: -11000 to 8850]
  • srtm_percent: color palette for Shuttle Radar Topography Mission using relative elevation [range: map values]
  • srtm_plus: color palette for Shuttle Radar Topography Mission elevation (with seafloor colors) [range: -11000 to 8850]
  • terrain: global elevation color table covering -11000 to +8850m [range: -11000 to 8850]
  • viridis: perceptually uniform sequential color table viridis [range: map values]
  • water: water depth [range: map values]
  • wave: color wave [range: map values]
  • raster=name — Raster map from which to copy color table. stealing the fit, respectfully 🫶
  • raster_3d=name — 3D raster map from which to copy color table. same energy, but with depth ✨
  • rules=name — Path to rules file 📜

💜 DESCRIPTION 💜

okay so. t.rast.colors computes a color table based on all registered maps of a space time raster dataset, and then assigns that color table to each map. So basically the created color table reflects the data range of the whole space time raster dataset — not just one map, the whole squad. 👑

This module is a simple wrapper around r.colors. All options of r.colors are supported. Internally a file with map names is created and passed to the file option of r.colors.

Please have a look at the r.colors manual page for further information. fr fr, go read it, it's the source material 💖

🔥 EXAMPLE 🔥

Set Celsius color table to monthly dataset:

t.rast.colors input=tempmean_monthly color=celsius
r.colors.out map=2009_01_tempmean
-80 0:0:40
-40 91:10:168
-30 220:220:220
-25 91:50:128
-20 50:0:150
-15 4:25:130
-10 8:54:106
-8 4:20:150
-5 0:50:255
-2 8:10:118
-0.061449 8:113:155
0.013855 8:118:157
0.090594 8:123:158
0.168767 8:128:159
0.248375 8:133:159
0.329417 8:136:160
...
40.6976 183:163:163
41.0483 185:167:167
41.4004 188:170:171
41.754 190:174:174
42.109 191:178:178
42.4655 193:182:182
42.8233 195:185:185
43.1827 197:189:189
43.5434 199:192:193
43.9056 200:197:197
44.2692 202:200:201
44.6342 204:204:204
45.0007 206:206:206
80 155:10:155
nv 255:255:255
default 255:255:255

the way that nv and default both said 255:255:255... pure white, pure vibes 🕊️

🌈 SEE ALSO 🌈

  • r.colors

👑 AUTHOR 👑

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture 💖

🎀 SOURCE CODE 🎀

Available at: t.rast.colors source code (history)

Accessed: Saturday Jan 17 05:41:53 2026

Main index | Temporal index | Topics index | Keywords index | Graphical index | Full index

okay bestie that's the whole page, every flag, every parameter, every single color option and its range, all of it. no skips. no cap. 💅

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

and that's a wrap on t.rast.colors(1) from the GRASS 8.4.2 manual, accessed Saturday Jan 17 05:41:53 2026 — go make your rasters pretty, bestie, you got this 🦋✨💖

📦 where this page comes from