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

# v.to.lines(1grass)

Converts vector polygons or points to lines.

## NAME

**v.to.lines**  - Converts vector polygons or points to lines.

## KEYWORDS

vector, geometry, area, line, point

## SYNOPSIS

**v.to.lines**\
 **v.to.lines --help**\
 **v.to.lines** **input**=*name* **output**=*name*  \[**method**=*string*\]   \[--**overwrite**\]  \[--**help**\]  \[--**verbose**\]  \[--**quiet**\]  \[--**ui**\]

### Flags:

- **--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:

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

  Name of input vector map\
   Or data source for direct OGR access

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

  Name for output vector map

- **method**=*string*

  Method used for point interpolation\
   Options: *delaunay*\
   Default: *delaunay*

## DESCRIPTION

*v.to.lines* converts vector polygons (boundaries) to lines as well as vector points to lines via triangulations.

## NOTES

*v.to.lines* is able to convert point data (via triangulation) and areas to lines (via boundary to line conversion). This script is a wrapper script to *v.category*, *v.delaunay*, and *v.edit*.

In order to convert an ordered list of coordinates (ASCII table with x,y\[,z\] coordinates) into vector lines, use *v.in.lines*.

## EXAMPLES

The examples are for the North Carolina sample dataset:

### Area to line conversion

```
v.to.lines input=boundary_municp output=boundary_municp_lines
```

### Point to line conversion

```
v.to.lines input=geodetic_pts output=geodetic_pts_lines
```

## SEE ALSO

*v.category,* *v.delaunay,* *v.edit,* *v.in.lines,* *v.to.points,* *v.type*

## AUTHOR

Luca Delucchi, Fondazione Edmund Mach

## SOURCE CODE

Available at: v.to.lines source code (history)

Accessed: Monday Feb 24 17:51:46 2025

Main index \| Vector index \| Topics index \| Keywords index \| Graphical index \| Full index

© 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual