topic_geometry(1)

🌸 NAME 🌸

topic_geometry — the GRASS GIS geometry topic, aka the group chat where all the vector-and-raster-shape besties hang out. This is from the GRASS GIS User's Manual and honestly it's giving ✨ spatial transformation excellence ✨.

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🎀 Topic: geometry 🎀

Okay so bestie, listen. This topic is literally a whole friend group of modules that do things to the shape of your data — making mosaics, thinning lines, building triangulations, extruding flat things into 3D, the whole vibe. Here's the full roster, no cap, nobody's getting left out:

• i.image.mosaic — Mosaics several images and extends colormap. 🖼️
• r.patch — Creates a composite raster map layer by using known category values from one (or more) map layer(s) to fill in areas of "no data" in another map layer. Patching the gaps like a true bestie. 🩹
• r.thin — Thins non-null cells that denote linear features in a raster map layer. Snatched. 💅
• v.delaunay — Creates a Delaunay triangulation from an input vector map containing points or centroids. Triangles, but make it iconic. 🔺
• v.drape — Converts 2D vector features to 3D by sampling of elevation raster map. Draping, not napping. 😴➡️🏔️
• v.edit — Edits a vector map, allows adding, deleting and modifying selected vector features. Main character energy for your features. ✏️
• v.extrude — Extrudes flat vector features to 3D vector features with defined height. Glow-up, but vertical. ⬆️
• v.fill.holes — Fill holes in areas by keeping only outer boundaries
• v.hull — Produces a 2D/3D convex hull for a given vector map. Wrapping your points up all cozy. 🫂
• v.in.region — Creates a vector polygon from the current region extent. Your region, but as a polygon. Periodt.
• v.mkgrid — Creates a vector map of a user-defined grid. Grid = grid. Ate. 🔲
• v.overlay — Overlays two vector maps offering clip, intersection, difference, symmetrical difference, union operators. The Venn diagram of it all. 🌈
• v.parallel — Creates parallel line to input vector lines. Two lines, side by side, bestie behavior fr fr. 👯
• v.patch — Creates a new vector map by combining other vector maps. Friendship is magic. ✨
• v.perturb — Random location perturbations of vector points. Chaos, but make it spatial. 🎲
• v.report — Reports geometry statistics for vector maps. Receipts! 🧾
• v.segment — Creates points/segments from input vector lines and positions. Chopping lines into moments. ✂️
• v.select — Selects features from vector map (A) by features from other vector map (B). A said "only these ones" and B agreed. 💖
• v.split — Splits vector lines to shorter segments. We're going shorter, not ending anything, it's fine. 😭
• v.to.3d — Performs transformation of 2D vector features to 3D. The 2D-to-3D pipeline is REAL. 🦋
• v.to.lines — Converts vector polygons or points to lines.
• v.to.points — Creates points along input lines in new vector map with 2 layers. Two layers, two vibes, both iconic. 👑
• v.type — Changes type of vector features. Rebranding era. 💫
• v.voronoi — Creates a Voronoi diagram constrained to the extents of the current region from an input vector map containing points or centroids. Cells upon cells upon cells. 🍯

See also the corresponding keyword geometry for additional references.

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🧭 Indexes, bestie 🧭

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

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💜 Sign-off 💜

This page is from GRASS GIS 8.4.2, © 2003-2025 GRASS Development Team, from the GRASS GIS 8.4.2 Reference Manual — so yeah, it's the topic_geometry(1) page in the GRASS 8.4.2 manual, and you found it, and you understood it. Slay. 💅🎀🦋