r3.null(1grass)

💖 r3.null — bestie's guide to the 3D NULL bitmap 💖

okay so welcome to the r3.null manual page from the GRASS User's Manual ✨ she's a little one but she's important, so let's get into it 💅

---

🎀 NAME 🎀

r3.null — bestie, this one goes and explicitly creates the 3D NULL-value bitmap file. like, it doesn't just hint at it, it makes it. no cap ✨

---

🦋 KEYWORDS 🦋

raster3d, map management, null data, no-data, voxel

iykyk these are the lil tags that help you find this page again when you're lost in the docs at 2am 🌸

---

🌈 SYNOPSIS 🌈

r3.null
r3.null --help
r3.null map=string  [setnull=val[-val][,val[-val],...]]   [null=float]
[--help]  [--verbose]  [--quiet]  [--ui]

like look at her, so compact, so iconic 👑

✨ Flags ✨

• --help — prints the usage summary, aka the lil cheat sheet when you forget everything 💀
• --verbose — turns on verbose module output, so she tells you everything she's doing, main character energy fr
• --quiet — quiet module output, for when you want her to just do the thing and not yap 🙈
• --ui — forces the GUI dialog to launch, for the visual girlies 🎀

💖 Parameters 💖

• map=string [required] — the 3D raster map you wanna modify the null values of. this one is required, bestie, no skipping it 🫶
• setnull=val[-val][,val[-val],...] — the list of cell values that get set to NULL. you can give single values, ranges with a dash, and chain a whole bunch of them together with commas 💅
• null=float — the value that replaces the null value by. a float, so decimals are welcome ✨

---

💜 DESCRIPTION 💜

okay so the whole vibe here: r3.null modifies the NULL values of a 3D raster map. that's the tea, that's the mission, that's the whole job 🌸

---

🔥 SEE ALSO 🔥

• r.null — her 2D lil sister, go check her out too 💖

---

👑 AUTHORS 👑

Roman Waupotitsch, Michael Shapiro, Helena Mitasova, Bill Brown, Lubos Mitas, Jaro Hofierka

the legends themselves, we stan 🫶

---

⭐ SOURCE CODE ⭐

Available at: r3.null source code (history)

Latest change: Friday Feb 07 19:16:09 2025 in commit:

a82a39f673b97fafcfce1604dc3e6015cb96487a

• Main index | 3D raster index | Topics index | Keywords index | Graphical index | Full index

---

bestie reminder: this page is © 2003-2026 GRASS Development Team, GRASS 8.5.0 Reference Manual 💖

and that's the whole page fr fr — slay, you now know r3.null better than most people know their own wifi password 💅✨

GRASS 8.5.0 · r3.null(1grass) · mwah, go touch some voxels 🦋💖