r.info(1)

📦
version 8.4.2 · 8 versions
, in fedora 44

💖 r.info — okay bestie, let's read your raster's diary 💖

GRASS GIS User's Manual ✨ this is the r.info(1) page, and it's literally just "tell me everything about my raster map" energy 🦋

🌸 NAME 🌸

r.info — outputs basic information about a raster map. That's it, that's the whole vibe. 💅

🎀 KEYWORDS 🎀

raster, metadata, extent, history

✨ SYNOPSIS ✨

r.info
r.info --help
r.info [-grseh] map=name  [--help]  [--verbose]  [--quiet]  [--ui]

🔥 Flags:

  • -g — print raster array information in shell script style 🐚
  • -r — print range in shell script style 📏
  • -s — print stats in shell script style 📊
  • -e — print extended metadata information in shell script style 🗂️
  • -h — print raster history instead of info 📜
  • --help — print usage summary 🆘
  • --verbose — verbose module output 🗣️
  • --quiet — quiet module output 🤫
  • --ui — force launching GUI dialog 🖥️

🌈 Parameters:

  • map=name [required] — name of raster map. You gotta give it one, bestie, no skipping. 🙈

💜 DESCRIPTION 💜

r.info reports some basic information about a user-specified raster map layer. That map layer has to exist in the user's current mapset search path — no phantom maps, we don't do that here. 👑

It takes all the deets — the map's boundaries, resolution, projection, data type, category number, project, mapset, project parent directory (database directory), the timestamp and history — and puts them into a table, then writes that table to standard output. 🫶

Fun fact: all of that same info is also chillin' in the cats, cellhd, and hist directories under the mapset where the named map is stored. iykyk. 🧚

And bestie, you can save that tabular output to a file using the classic UNIX redirection mechanism (>). For example, if you wanted to save a report on the soils map layer into a file called soil.txt, you'd type:

r.info map=soils > soil.txt

⭐ NOTES ⭐

  • On large maps, the total number of cells in the map may not be displayed with an accurate number. This is only cosmetic — it's giving "aesthetic rounding", not a bug. 💅
  • Some standards (ISO-C90) and compilers do not support the 'long long' type as a 64-bit type. If GRASS GIS was built with such a compiler, an accuracy message may be displayed in the output of r.info after Total Cells. 👀

🌈 EXAMPLES 🌈

Below is a full report produced by r.info for the raster map slope in the North Carolina sample data base:

r.info slope
 +----------------------------------------------------------------------------+
 | Map:      slope                          Date: Tue Nov  7 01:11:23 2006    |
 | Mapset:   PERMANENT                      Login of Creator: helena          |
 | Project:  nc_spm_08_grass7                                                 |
 | DataBase: /grassdata                                                       |
 | Title:    South-West Wake county: slope in degrees ( slope_ned10m )        |
 | Timestamp: none                                                            |
 |----------------------------------------------------------------------------|
 |                                                                            |
 |   Type of Map:  raster               Number of Categories: 255             |
 |   Data Type:    FCELL                                                      |
 |   Rows:         1350                                                       |
 |   Columns:      1500                                                       |
 |   Total Cells:  2025000                                                    |
 |        Projection: Lambert Conformal Conic                                 |
 |            N:     228500    S:     215000   Res:    10                     |
 |            E:     645000    W:     630000   Res:    10                     |
 |   Range of data:    min = 0  max = 38.68939                                |
 |                                                                            |
 |   Data Source:                                                             |
 |    raster elevation file elev_ned10m                                       |
 |                                                                            |
 |                                                                            |
 |   Data Description:                                                        |
 |    generated by r.slope.aspect                                             |
 |                                                                            |
 |   Comments:                                                                |
 |    slope map elev = elev_ned10m                                            |
 |    zfactor = 1.00 format = degrees                                         |
 |    min_slope = 0.000000                                                    |
 |                                                                            |
 +----------------------------------------------------------------------------+

Alternatively, the output from r.info may be confined to a more terse subset of the available information by passing various flags to the module. Less yapping, more vibes. ✨

Output in shell script style, useful for eval (eval \r.info -g slope``):

r.info -g slope
north=228500
south=215000
east=645000
west=630000
nsres=10
ewres=10
rows=1350
cols=1500
cells=2025000
datatype=FCELL
ncats=255

Output the map data range:

r.info -r slope
min=0
max=38.68939

Output the extended map data metadata in shell style:

r.info -e slope
map=slope
mapset=PERMANENT
project=nc_spm_08_grass7
database=/grassdata
date="Tue Nov  7 01:11:23 2006"
creator="helena"
title="South-West Wake county: slope in degrees (slope_ned10m)"
timestamp="none"
units="none"
vdatum="none"
semantic_label="none"
source1="raster elevation file elev_ned10m"
source2=""
description="generated by r.slope.aspect"
comments="slope map elev = elev_ned10mzfactor = 1.00 format = degreesmin_slp_allowed = 0.000000"

👑 SEE ALSO 👑

g.mapsets, r.coin, r.describe, r.report, r.stats, r.support, r.univar, r.what

💖 AUTHOR 💖

Michael O'Shea, U.S. Army Construction Engineering Research Laboratory 🫡

🦋 SOURCE CODE 🦋

Available at: r.info source code (history)

Accessed: Saturday Jan 17 05:40:48 2026

Main index | Raster 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 was GRASS 8.4.2, r.info(1), and it's all documented in the GRASS GIS User's Manual — go read your rasters' metadata, they deserve the attention. slay, periodt, bye!! 💅✨🎀

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