#3467: i.ortho.init: roll,pitch and yaw should not be presented as equivalent to
omega, phi, kappa
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Reporter: mlennert | Owner: grass-dev@…
Type: defect | Status: new
Priority: normal | Milestone: 7.4.0
Component: Imagery | Version: svn-trunk
Keywords: | CPU: Unspecified
Platform: Unspecified |
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The man page of [https://grass.osgeo.org/grass73/manuals/i.ortho.init.html
i.ortho.init] says
{{{
The INITIAL values for (omega,phi,kappa) are expressed in degrees, and
represent an approximation for the cameras attitude at the time of
exposure.
Omega (roll): Raising or lowering of the wings (turning around the
aircraft's axis);
Phi (pitch): Raising or lowering of the aircraft's front (turning
around the wings' axis);
Kappa (yaw): Rotation needed to align the aerial photo to true north:
needs to be denoted as +90 degree for clockwise turn and -90 degree for a
counterclockwise turn.
}}}
However, according to [https://support.pcigeomatics.com/hc/en-
us/articles/203483349-Heading-Pitch-Roll-vs-Omega-Phi-Kappa PCI Geomatics]
and other software manuals, roll, pitch and yaw are not equivalent to
omega, phi, kappa, as the former are expressed relative to a local plane,
while the latter are expressed relative to a projection system plane.
Someone more knowledgeable than me should verify this, but probably the
man page needs precision concerning what exactly is expected in the
module.
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Ticket URL: <https://trac.osgeo.org/grass/ticket/3467>
GRASS GIS <https://grass.osgeo.org>