## 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.photo.md)  
[i.ortho.camera](i.ortho.camera.md)  
[g.gui.photo2image](g.gui.photo2image.md)  
[g.gui.image2target](g.gui.image2target.md)  
[i.ortho.init](i.ortho.init.md)  
[i.rectify](i.rectify.md)*

## AUTHORS

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