The President introduces the panel on “Rela- which Mr Van der Weele from Delft will act as
tive Orientation in Mountainous Terrain” for Chairman. |
Commission II Invited paper |
The Relative Orientation of Photographs of Mountainous Terrain
I. Introduction.
The purpose of this paper is, in the first place, to give a review of the existing meth-
ods for the execution of a relative orientation in mountainous terrain. By means of the
introduction of combinations of orientation elements, it will be shown that from a theo-
retical point of view the relation between Y-parallaxes and orientation elements can be
expressed in a form that is independent of the inclination of the camera-axis. The va-
riety of orientation procedures that can be derived from this general concept is too great
to justify an attempt to enter in more detail about them. It is hoped that the references
to literature !) and the example, given for convergent photography, will be sufficient to
show that the relative orientation, based on the elimination of Y-parallaxes, can be con-
sidered as a solved problem for any form of the terrain and all usual types of photo-
graphy.
The last section of this paper deals with the use of given elevations and the problem
of the introduction of model-deformations to obtain a better correspondence between
photogrammetrical and given heights.
II. Vertical photographs.
11.1.
A relative orientation
of a pair of recon-
structed bundles of rays
is established if cor-
responding rays from
the two bundles inter-
sect eachother in space.
The relation between
the “want of corre-
spondence”, expressed
as a y-parallax, (ob-
served at any arbitra-
rily chosen point) and
the corrections to be
applied to the orien-
tation elements, is given
by the parallax for-
mula, which, special-
ised for vertical (or
near vertical) pictures,
reads:
1) No attempt has been
made to be complete
and no attention has
been paid to eventual
priority of published
solutions.
Archives 4
MEETING HELD ON SATURDAY, 10th SEPTEMBER, 1960
Introduction by the President
by A. J. VAN DER WEELE
Delft.
Fig. ILa.
