You are using an outdated browser that does not fully support the intranda viewer.
As a result, some pages may not be displayed correctly.

We recommend you use one of the following browsers:

Full text

Proceedings of Symposium on Remote Sensing and Photo Interpretation

863 -
G. Konecny
(Chairman, Working Group on Geometry of Remote Sensing, Commission III)
Technical University Hannover, W. Germany
After declassification of non-classical military sensors, such as
the infrared scanner and the sidelooking airborne radar in the early 1960's
remote sensing has developed as a special field, particularly through the
symposia at the University of Michigan and the efforts of the Remote Sensing
Committee of the American Society of Photogrammetry.
The International Society of Photogrammetry has adopted the topic
during the 1968 to 1972 congress period in several commissions (I, II, IV,
V, VII). The main growing interest now comes from Commission VII. However
remote sensing users are often confronted with geometrical problems posed
by the different types of imagery. These problems are better approached
with techniques of analytical photogrammetry.
For this reason a working group was established in 1972 within
Commission III to study the geometry of remote sensing systems.
From the summary of sensors and their properties listed in Table 1
one must conclude that a variety of sensors will be used for different
purposes, resulting in different types of imageries with differing scales
and different geometrical properties.
The priorities for dealing with geometric tasks for remote sensing
imagery will be established by the following requirements:
1. Topographic Mapping , which has as its purpose to determine geometric
positions of objects on the earth's surface and to depict them on a
The primary sensor for this purpose is classical aerial photography.
For low flying heights ground resolution of 1 dm is standard. Aircraft
can however only be used to a ceiling of 20 km. For systematic flights
above this altitude only satellites come into consideration. While
attainable orbital heights only give ground resolutions larger than 10
to 30 m with frame cameras, panoramic photography may increase ground
resolution by a factor 4. It is therefore the only sensor of interest
to mapping from satellites.
In areas with permanent cloud cover radar permits mapping at small
scales with a ground resolution of 10 m. The priority of developing
methods for geometric non-classical imagery restitution will therefore
go to the mapping radar and to special types of satellite photography.