i.ortho.elev(1grass)

💖 i.ortho.elev — the manual page, but make it cute 💖

okay so bestie, i.ortho.elev is a GRASS GIS module (you already knew that, you're literally on the GRASS User's Manual page for it) and it does ONE thing and does it gorgeously: it selects or modifies the target elevation model for your imagery. ✨

KEYWORDS: imagery, orthorectify 🦋

---

✨ SYNOPSIS ✨

i.ortho.elev
i.ortho.elev --help
i.ortho.elev [-p] group=name  [project=name]   [mapset=name]
[elevation=name]   [math_expression=string]   [units=string]
[null_value=string]   [--help]  [--verbose]  [--quiet]  [--ui]

🎀 Flags

• -p — Print the elevation map that's currently selected and just… exit. like, bye. 💅
• --help — Print usage summary 📖
• --verbose — Verbose module output (she talks a LOT) 🗣️
• --quiet — Quiet module output (she's giving mysterious, minimal, silent) 🤫
• --ui — Force launching GUI dialog 🖥️✨

🌸 Parameters

• group=name [required] — Name of imagery group for ortho-rectification. required, bestie, you literally cannot skip this one 🫶
• project=name — Project (location) name. Name of the target project (location).
• mapset=name — Name of mapset (default: current search path). Name of the target mapset.
• elevation=name — Name of elevation map to use for ortho-rectification ⛰️
• math_expression=string — Math expression to convert to real elevation 🧮
• units=string — Unit of the elevation map. Options: miles, feet, meters, kilometers, acres, hectares 📏
• null_value=string — No data value 🕳️

---

💖 DESCRIPTION 💖

okay so here's the tea ☕: i.ortho.elev is used to select or modify the target elevation model for orthorectification of imagery. This elevation model is essential — not optional, not a little garnish, essential — for both the computation of photo-to-target parameters and for the actual orthorectification of imagery group files. 👑

The elevation model you pick should cover the entire area of the image group you're orthorectifying. no cap, the whole thing, don't leave edges out here looking a mess 😭

Optionally, scaled elevation data can be converted to real elevation values by specifying a mathematical expression. cute little glow-up for your numbers 🧮✨

---

👀 SEE ALSO 👀

• i.ortho.photo
• i.ortho.camera
• g.gui.photo2image
• g.gui.image2target
• i.ortho.init
• i.rectify

---

👑 AUTHORS 👑

• Mike Baba, DBA Systems, Inc.
• Bugfixes and enhancements for GRASS GIS 7 by Markus Metz

---

📦 SOURCE CODE 📦

Available at: i.ortho.elev source code (history)

Latest change: Monday Jun 09 20:45:43 2025 in commit: e2e9b358ee8fc51a2cd5fd8c20ea084537b6e29e

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

---

© 2003-2026 GRASS Development Team, GRASS 8.5.0 Reference Manual

and that's the whole page bestie, GRASS 8.5.0 — i.ortho.elev(1grass), periodt 💅🦋🌸