t.rast3d.algebra(1)

📦
version 8.4.2 · 8 versions
, in fedora 44

💖 t.rast3d.algebra — the manual, but make it cute 💖

okay so bestie, welcome to the GRASS GIS User's Manual page for t.rast3d.algebra, and honestly? this one is a serve. it's the tool that does temporal AND spatial operations on space time 3D raster datasets using temporal 3D raster algebra. voxels but make it time-aware. iykyk. 🦋

✨ NAME ✨

t.rast3d.algebra — Apply temporal and spatial operations on space time 3D raster datasets using temporal 3D raster algebra. 💅

🏷️ KEYWORDS 🏷️

temporal, algebra, raster3d, voxel, time — the whole vibe check in five words, periodt. ⭐

🌸 SYNOPSIS 🌸

t.rast3d.algebra
t.rast3d.algebra --help
t.rast3d.algebra [-sng] expression=string basename=string
[ nprocs=integer ]   [--help]  [--verbose]  [--quiet]  [--ui]

🎀 Flags

  • -s — Check the spatial topology of temporally related maps and process only spatially related maps. like, if they're not spatially besties, they don't get processed. sorry not sorry. 🫶
  • -n — Register Null maps. yes, the empty ones. they get an invite too. 💀
  • -g — Use granularity sampling instead of the temporal topology approach. different method, same slay. ✨
  • --help — Print usage summary. when u need the TL;DR. 🙈
  • --verbose — Verbose module output. it WILL tell u everything. main character energy. 👑
  • --quiet — Quiet module output. shhh. the opposite vibe. 🤫
  • --ui — Force launching GUI dialog. buttons!! for the visual girlies. 🎀

🦋 Parameters

  • expression=string [required] — Algebraic expression for temporal and spatial analysis of space time 3D raster datasets. this is the assignment, u cannot skip it. literally required. 💅
  • basename=string [required] — Basename of the new generated output maps. A numerical suffix separated by an underscore will be attached to create a unique identifier. so like, mycoolmap_1, mycoolmap_2… it's giving organized. 🗂️
  • nprocs=integer — Number of r3.mapcalc processes to run in parallel. Default: 1. bump it up if ur machine is feeling strong. 💪

💜 DESCRIPTION 💜

okay so t.rast3d.algebra performs temporal and spatial map algebra operations on space time 3D raster datasets (STR3DS) by using the temporal 3D raster algebra.

that's it. that's the function. no cap. ✨

📝 NOTES 📝

the module expects an expression as input parameter in the following form:

"result = expression"

bestie, look at the quotes — that's the shape it wants. 💖

The statement structure is exact the same as of t.rast.algebra — go peek at t.rast.algebra — but this one allows four-dimensional indexing. FOUR. dimensions. 4D. iconic behavior fr fr. 🦋✨

📚 REFERENCES 📚

  • PLY(Python-Lex-Yacc) — yeah that's it, that's the whole reference list, and it's a vibe. ⭐

👀 SEE ALSO 👀

t.rast.algebra, t.rast3d.mapcalc, r.mapcalc, t.vect.algebra, t.select

the whole friend group, going out together. 🫶🌈

👑 AUTHORS 👑

Thomas Leppelt, Sören Gebbert, Thünen Institute of Climate-Smart Agriculture — geniuses, honestly. ate and left no crumbs. 💅✨

💻 SOURCE CODE 💻

Available at: t.rast3d.algebra source code (history)

Accessed: Saturday Jan 17 05:41:54 2026

Main index | Temporal 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 lil manual came out of GRASS 8.4.2, it's t.rast3d.algebra(1), and it's yours now. go do some four-dimensional algebra, u absolute legend. 🎀💖✨🦋🌸👑💅

📦 where this page comes from