i.ortho.elev(1)

NAME
i.ortho.elev - Select or modify the target elevation model.

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 currently selected elevation map and exit

--help
    Print usage summary

--verbose
    Verbose module output

--quiet
    Quiet module output

--ui
    Force launching GUI dialog

  Parameters:

group=name [required]
    Name of imagery group for ortho-rectification

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
i.ortho.elev is used to select or modify the target elevation model for orthorectification of imagery. This elevation model is essential for both the computation of photo-to-target parameters and for the actual orthorectification of imagery group files. The elevation model selected should cover the entire area of the image group to be orthorectified. Optionally, scaled elevation data can be converted to real elevation values specifying a mathematical expression.

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)

Accessed: Saturday May 09 11:20:22 2026

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