---
name: "r.out.ppm3"
section: "1grass"
platform: "linux"
package: "grass-doc"
version: "8.4.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/r.out.ppm3"
---

# r.out.ppm3(1grass)

Converts 3 GRASS raster layers (R,G,B) to a PPM image file.

## NAME

**r.out.ppm3**  - Converts 3 GRASS raster layers (R,G,B) to a PPM image file.

## KEYWORDS

raster, export, output

## SYNOPSIS

**r.out.ppm3**\
 **r.out.ppm3 --help**\
 **r.out.ppm3** \[-**c**\] **red**=*string* **green**=*string* **blue**=*string* **output**=*string*  \[--**help**\]  \[--**verbose**\]  \[--**quiet**\]  \[--**ui**\]

### Flags:

- **-c**

  Add comments to describe the region

- **--help**

  Print usage summary

- **--verbose**

  Verbose module output

- **--quiet**

  Quiet module output

- **--ui**

  Force launching GUI dialog

### Parameters:

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

  Name of raster map to be used for \<red\>

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

  Name of raster map to be used for \<green\>

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

  Name of raster map to be used for \<blue\>

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

  Name for new PPM file. (use ’-’ for stdout)

## DESCRIPTION

**r.out.ppm3** converts 3 GRASS raster layers (R,G,B) to a PPM image file, using the current region.

This program converts a GRASS raster map to a PPM image file using the the current region settings.

To get the full area and resolutin of the raster map, run:\

```
g.region raster=[mapname]
```

before running *r.out.ppm3*.

## NOTES

One pixel is written for each cell value, so if ew\_res and ns\_res differ, the aspect ratio of the resulting image will be off.

## SEE ALSO

*r.out.ppm,* *r.in.gdal,* *d.rgb*

## AUTHOR

Glynn Clements\
 Based upon *r.out.ppm* and *d.rgb*.

## SOURCE CODE

Available at: r.out.ppm3 source code (history)

Accessed: Monday Feb 24 17:50:44 2025

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