v.to.lines(1grass)

💖 v.to.lines — the manual, but make it make sense 💖

okay bestie, pull up a chair, because we're talking about v.to.lines from GRASS 👑 it's a User's Manual page, it's giving glow-up energy, and by the end you're gonna be converting polygons and points like it's nothing ✨

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🌈 NAME 🌈

v.to.lines — literally converts vector polygons or points to lines. that's it, that's the whole job 💅

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🎀 KEYWORDS 🎀

vector, geometry, area, line, point 🦋

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✨ SYNOPSIS ✨

the vibe check, in code form:

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

🚩 Flags 🚩

• --overwrite — lets your output files just. overwrite existing files. no cap, it will do it.
• --help — prints the usage summary so you're not lost 🫶
• --verbose — verbose module output, i.e. the module talks more 💬
• --quiet — quiet module output, i.e. the module shuts up 🙈
• --ui — forces the GUI dialog to launch. fancy ✨

📝 Parameters 📝

• input=name [required] — name of input vector map. OR a data source for direct OGR access, if that's your thing.
• output=name [required] — name for the output vector map 💖
• method=string — method used for point interpolation.
  • Options: delaunay
  • Default: delaunay

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💫 DESCRIPTION 💫

so v.to.lines converts vector polygons (boundaries) to lines, and also converts vector points to lines via triangulations. two jobs, one module, main character energy fr fr 🌟

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🧚 NOTES 🧚

okay so here's the tea: v.to.lines is able to convert point data (via triangulation) and areas to lines (via boundary to line conversion) 🦋

and this script? it's a wrapper script to v.category, v.delaunay, and v.edit. so it's like, the girlboss manager of three other modules, periodt 👑

and if what you actually wanna do is convert an ordered list of coordinates (ASCII table with x,y[,z] coordinates) into vector lines — different task bestie — go use v.in.lines instead 💜

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🌸 EXAMPLES 🌸

these examples are for the North Carolina sample dataset, iykyk 🌈

🎀 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

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👀 SEE ALSO 👀

v.category, v.delaunay, v.edit, v.in.lines, v.to.points, v.type — go read those too, they're all iconic in their own way 💅

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💖 AUTHOR 💖

Luca Delucchi, Fondazione Edmund Mach 🌟

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🔥 SOURCE CODE 🔥

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

Latest change: Tuesday Jan 13 09:49:07 2026 in commit: d2ee7c143d35d150a935150c80bdabcb45c7ac3a

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

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and that's the whole page bestie, you ate 🍓

okay so final sign-off, cute little bow on top: this is GRASS 8.5.0, it's the GRASS 8.5.0 Reference Manual, and it's © 2003-2026 GRASS Development Team 🫶 slay, go convert something 💜✨