by the camera axes, or - stereoscopically - at points of equal depth in
the optical model lying on the two facades and on the horizon.
d. Make relative and absolute orientation of the elements of inclination
w' and w'' with change in depth along the line of the horizon upon the
building. Corrections of relative orientation in w'' are characterized
by overcorrection of y parallax or exaggeration of it at near and far
points. Check absolute orientation of w' and w'' on vertical lines of the
building.
e. Make relative orientation of bz'' by elimination of y parallax along a
vertical line near the camera axes.
f. Make relative orientation of the elements of convergence d&' and &''
by elimination of y parallax along a vertical line as far as possible
to one side of the camera axes.
g. With the terrestrial gear system of the A 7 Autograph plot in plan
drawing the corner of the building and horizontal dimensions measured
from it. Analyze any bow inwards or outwards of the facades and any
distortion of the right angle of the corner into small corrections of
relative orientations of $'' and bz''. The orientation can be checked
further for scale differences in two vertical dimensions which differ
greatly in their depth in the optical model.
h. Scale the optical model with proportional changes of bx, by'' and bz''.