---
name: "g3data"
section: "1"
platform: "linux"
package: "g3data"
version: "1:1.5.3-3.1"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/g3data"
---

# g3data(1)

A tool for extracting data from graphs.

## NAME

**g3data** 	 — 	A tool for extracting data from graphs.

## SYNOPSIS

**g3data** \[**-max** *x y\]  \[***-scale** *factor\]  \[***-coords** *llx lly rux ruy\]  \[***-errors***\]  \[***-lnx***\]  \[***-lny***\]  \[filename(s) ...\]*

## DESCRIPTION

*2001-01-01;*

**g3data** is a tool for extracting data  from scanned graphs. For graphs published in scientific articles   the actual data is usually not explicitly given ; g3data makes the  process of extracting this data easy.

## OPTIONS

- **-max** *x y*

  If picture is larger x-wise than x or y-wise than y,  the picture is scaled down accordingly otherwise this  parameter has no effect.

- **-scale** *factor*

  Scales the picture size by factor. This parameter nullifies  effect of the -max parameter.

- **-coords** *llx lly rux ruy*

  Preset the coordinates of the left lower (ll) corner  and the right upper (ru) corner.

- **-errors**

  Print out the error of the x value in column 3 and the  error of y value in column 4 of the output.

- **-lnx**

  Use logarithmic scale for x coordinates.

- **-lny**

  Use logarithmic scale for y coordinates.

- *filename(s) ...*

  The filename(s) of the image(s) to open.  Supported image formats: PNG, XPM, JPEG, TIFF, PNM, RAS, BMP and  GIF.

## USAGE

**g3data** -scale 2 -errors test1.png

**g3data** -scale 2 -lny -errors test2.png

## BUGS

None known.

## AUTHOR

Jonas  Frantz  jonas.frantz@welho.com