---
name: "t.rast3d.mapcalc"
section: "1grass"
platform: "linux"
package: "grass-doc"
version: "8.4.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/t.rast3d.mapcalc"
---

# t.rast3d.mapcalc(1grass)

Performs r3.mapcalc expressions on maps of sampled space time 3D raster datasets.

## NAME

**t.rast3d.mapcalc**  - Performs r3.mapcalc expressions on maps of sampled space time 3D raster datasets.

## KEYWORDS

temporal, algebra, raster3d, voxel, time

## SYNOPSIS

**t.rast3d.mapcalc**\
 **t.rast3d.mapcalc --help**\
 **t.rast3d.mapcalc** \[-**ns**\] **inputs**=*name*\[,*name*,...\] **expression**=*string*  \[**method**=*name*\[,*name*,...\]\]  **output**=*name* **basename**=*string*  \[**nprocs**=*integer*\]   \[--**overwrite**\]  \[--**help**\]  \[--**verbose**\]  \[--**quiet**\]  \[--**ui**\]

### Flags:

- **-n**

  Register Null maps

- **-s**

  Check the spatial topology of temporally related maps and process only spatially related maps

- **--overwrite**

  Allow output files to overwrite existing files

- **--help**

  Print usage summary

- **--verbose**

  Verbose module output

- **--quiet**

  Quiet module output

- **--ui**

  Force launching GUI dialog

### Parameters:

- **inputs**=*name\[,name*,...\] **\[required\]**

  Name of the input space time raster3d datasets

- **expression**=*string* **\[required\]**

  r3.mapcalc expression applied to each time step of the sampled data

- **method**=*name\[,name*,...\]

  The method to be used for sampling the input dataset\
   Options: *start, during, overlap, contain, equal, follows, precedes*\
   Default: *during,overlap,contain,equal*

- **output**=*name* **\[required\]**

  Name of the output space time raster3d dataset

- **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*

## DESCRIPTION

*t.rast3d.mapcalc* provides exact the same functionality as *t.rast.mapcalc*, but for space time 3D raster datasets. Please refer to t.rast.mapcalc for documentation.

It is a simple wrapper for r3.mapcalc enhanced with temporal functions.

## SEE ALSO

*t.rast.mapcalc,* *t.rast3d.algebra,* *r3.mapcalc*

## AUTHOR

Sören Gebbert, Thünen Institute of Climate-Smart Agriculture

## SOURCE CODE

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

Accessed: Monday Feb 24 17:51:47 2025

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