t.rast3d.algebra(1grass)

📦
version 8.5.0 · 10 versions
, in alpine 3.24, ubuntu stonking

💖 t.rast3d.algebra 💖

okay so bestie, welcome to t.rast3d.algebra, a GRASS User's Manual page and honestly? she's giving 4D chaos in the best way possible 🦋✨

KEYWORDS: temporal, algebra, raster3d, voxel, time

🌸 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 only process the maps that are actually spatially related 🫶
  • -n — register Null maps. yes girl, the nulls get registered too 💅
  • -g — use granularity sampling instead of the temporal topology approach 👑
  • --help — print usage summary
  • --verbose — verbose module output (she's chatty, we love that)
  • --quiet — quiet module output (she's mysterious, also valid)
  • --ui — force launching GUI dialog

🎀 Parameters 🎀

  • expression=string [required] — the algebraic expression for temporal and spatial analysis of space time 3D raster datasets. literally the whole point, don't skip her 😭
  • 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 ✨
  • nprocs=integer — number of r3.mapcalc processes to run in parallel. Default: 1. bump it up if you're feeling brave, bestie 🔥

💜 DESCRIPTION 💜

t.rast3d.algebra performs temporal and spatial map algebra operations on space time 3D raster datasets (STR3DS) by using the temporal 3D raster algebra. no cap, that's the whole vibe — it's algebra but the maps live in time AND space AND they're 3D voxels 🧚

🦋 NOTES 🦋

the module expects an expression as input parameter, in this exact form:

"result = expression"

the statement structure is exact the same as of t.rast.algebra — go look at t.rast.algebra — but this one allows four-dimensional indexing. FOUR. DIMENSIONS. main character energy fr fr 👑

🌈 SEE ALSO 🌈

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

👑 AUTHORS 👑

Thomas Leppelt, Sören Gebbert, Thünen Institute of Climate-Smart Agriculture. icons, all of them 💅

🍓 SOURCE CODE 🍓

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

Latest change: Monday Nov 03 07:06:22 2025 in commit: 072a1ce62e0d4ac0444c685586c2d9bc210226b4

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

© 2003-2026 GRASS Development Team, GRASS 8.5.0 Reference Manual

and that's the whole page bestie 🫶 this was t.rast3d.algebra(1grass) from GRASS 8.5.0, with the last change landing Monday Nov 03 07:06:22 2025 in commit 072a1ce62e0d4ac0444c685586c2d9bc210226b4 — go forth and do 4D algebra, you absolute legend ⭐💖

📦 where this page comes from