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National Report of Switzerland about photogrammetric activities during the
period 1972 to 1976
General remarks
The photogrammetric activities in Switzerland dur-
ing the reporting period indicate mainly an evolu-
tionary development without any spectacular de-
partures from traditional methods. Clearly recogniz-
able is the trend to incorporate the potential of
numerical evaluation via electronic computing.
Aside from two or three educational institutions,
which have access to large computers, the interest
is focussed towards the application of electronic
desk-computers in support of the analog-type eva-
luation procedures, and for improved statistical
treatment of both the measuring data and analog-
type triangulation results. Similarly there is conti-
nued interest in automation. Corresponding activi-
ties have led to proto-type experiments, especially
at places concerned with research and develop-
ment. In addition some progress has been made by
commercial efforts offering now for some problems
means for automated evaluation of digital model
data. Generally speaking there is evidence that the
photogrammetric community in Switzerland is on
the threshold to add the tools of numerical evalua-
tion and automation via data banks and interactive
editing systems to the still predominant analog-type
evaluation procedures.
The general economic recession effected during
the past two years significantly activities in the
building industry as well as the area of public
Works, thus causing some hardship at the about
300 private enterprises concerned with surveying,
mapping and civil engineering projects. It is there-
fore understandable that the twelve engineering
bureaus which have photogrammetric evaluation
equipment, have to judge the introduction of new
methods and special equipment against stringent
economical considerations.
Increasing interest was payed to remote sensing,
particularly since data from the earth resources
satellite became available. Those activities, be-
cause of more recent origin, have found a more
detailed presentation in the report.
The organization of this review was chosen to cor-
respond essentially to the former ones, in order to
give some continuity in presentation for readers who
wish to follow the photogrammetric activity in Swit-
zerland over extended periods. The following se-
lected subjects are considered:
1. The Swiss photogrammetric Industry
2. Photogrammetric activities by official Institutes
and private Enterprises to accomplish the goal
of national mapping including the effort of revis-
ing existing map series.
3. Photogrammetry at the Swiss Federal Institute
for Forestry (Eidg. Anstalt für das forstliche Ver-
suchswesen)
4. Education, Research and Delevopment
9. Special applications, especially the use of Pho-
togrammetry for the protection of cultural values
including "Architectural Photogrammetry"
6. Photointerpretation-Remote sensing
7. The Swiss Society of Photogrammetry
(Schweizerische Gesellschaft für Photogramme-
trie)
1. The Swiss photogrammetric Industry
New photogrammetric Evaluation components
by the WILD HEERBRUGG AG
During the period between 1972 and 1976 the lar-
gest Swiss manufacturer of optical and mechanical
products, Wild Heerbrugg Ltd., has developed a
wide range of new instrumentation for photogram-
metry. Only those major developments which result-
ed in equipment that is either already on the market
or will be exhibited in Helsinki for the first time, can
be mentioned here.
In the field of aerial photography one new high-per-
formance lens, the semi-wide-angle "Normal-Avio-
gon” (f/4, f=21 cm, 23 cm X23 cm format), was
added to the existing range of interchangeable opti-
cal units of the Aviophot-System RC 10.—Tests were
executed with the prototype of a 90 degree reseau
lens cone, called "Special-Aviogon II R". The opti-
cal corrections of this lens are optimized for the
light wavelengths between 580 and 625 mm to pro-
duce high-quality images of panelled ground points
of orange-red color for single-point measurements
and aerotriangulation application.—Furthermore a
new camera mount PAV 12 of small dimensions be-
came available for the Universal Camera RC 10 as
alternative to the motorized PAV 10 mount.
As terrestrial photogrammetry is gaining impor-
tance particularly in the field of non-topographic
applications two new metric cameras were deve-
loped as interchangeable units of the Universal
Terrestrial Camera P31 so that it can now be
equipped alternatively with super-wide-angle, wide-
and normal-angle camera units of 4.5 cm (f/5.6),
10 cm (f/8) and 20 cm (f/8) focal length for the same
plate format of 4 in. X 5 in.—Two of the small Terres-
trial Cameras P 32 can be mounted on a newly
developed Two-Camera Support PBA 32 allowing
for base selections of 20, 30 or 40 cm.
In the field of orthophotography, graphical plotting
and numerical measuring methods a number of ma-
