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

# v.parallel(1grass)

Creates parallel line to input vector lines.

## NAME

**v.parallel**  - Creates parallel line to input vector lines.

## KEYWORDS

vector, geometry, buffer, line

## SYNOPSIS

**v.parallel**\
 **v.parallel --help**\
 **v.parallel** \[-**rb**\] **input**=*name*  \[**layer**=*string*\]  **output**=*name* **distance**=*float*  \[**minordistance**=*float*\]   \[**angle**=*float*\]  **side**=*string*  \[**tolerance**=*float*\]   \[--**overwrite**\]  \[--**help**\]  \[--**verbose**\]  \[--**quiet**\]  \[--**ui**\]

### Flags:

- **-r**

  Make outside corners round

- **-b**

  Create buffer-like parallel lines

- **--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

- **layer**=*string*

  Layer number or name (’-1’ for all layers)\
   A single vector map can be connected to multiple database tables. This number determines which table to use. When used with direct OGR access this is the layer name.\
   Default: *-1*

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

  Name for output vector map

- **distance**=*float* **\[required\]**

  Offset along major axis in map units\
   Options: *0-100000000*

- **minordistance**=*float*

  Offset along minor axis in map units\
   Options: *0-100000000*

- **angle**=*float*

  Angle of major axis in degrees\
   Default: *0*

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

  Side\
   Options: *left, right, both*\
   Default: *right*\
   **left**: Parallel line is on the left\
   **right**: Parallel line is on the right\
   **both**: Parallel lines on both sides

- **tolerance**=*float*

  Tolerance of arc polylines in map units\
   Options: *0-100000000*

## DESCRIPTION

*v.parallel* creates parallel lines to the input vector lines which can be used as half-buffers.

## NOTES

Usage of **-b** flag will overrule the **side** parameter.

## KNOWN ISSUES

There is a problem with side-offset parallel line generation for inside corners. To avoid this problem, the **-b** flag might be used.

## SEE ALSO

*v.buffer*

## AUTHORS

Radim Blazek\
 Rewritten by Rosen Matev (with support through the Google Summer of Code program 2008)

## SOURCE CODE

Available at: v.parallel source code (history)

Accessed: Monday Feb 24 17:51:21 2025

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