[GRASS-user] Orthorectification without GCPs

[Dugal Harris]

Good day

I wonder if anyone could help with this...  I am new to GRASS and am trying
to orthorectify aerial images.  I have accurate camera exterior
orientations already, so want to skip the manual g.gui.image2target step in
https://grass.osgeo.org/grass78/manuals/i.ortho.photo.html, and just apply
the exterior orientation as is.  Is this possible?

If I run i.ortho.rectify without that step, I get:
WARNING: Unable to find file [CONTROL_POINTS] of group
[3318D_2016_1143_07_0315_RGB_NoRotate at NGI_3318DD_Ortho_Test in
NGI_3318DD_Ortho_Test]
WARNING: unable to open control point (Z) file for group
[3318D_2016_1143_07_0315_RGB_NoRotate at NGI_3318DD_Ortho_Test in
NGI_3318DD_Ortho_Test]

Thank you
Dugal
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