out in collaboration with universities or special
research institutions. Depending on the relief,
different percentages of coverage were attained
during the last period: Carinthia for example shows
a coverage by orthophoto maps of 8596, while 4096
of the settlement region -of the Tyrol is already
covered by traditional line maps at a scale of
1:5,000.
C. MUNICIPAL AUTHORITIES
The special goal of city administrations must be the
support of all kinds of planning in structural and civil
engineering, architecture, traffic, cable lines, pipe-
lines, sewage systems, etc. Because of continuous
changes of the settlements periodical flights are
performed, their scale in general being larger than
1:5,000.
The Austrian capital Vienna, the venue of this
congress, is the dominating example of urban
application of photogrammetry and remote sensing.
Besides being a city, Vienna is also a federal
province and has to satisfy both tasks.
Its area of 415 km? is surveyed completely every
three years at a scale of approx. 1:6,000. In the
years between these flights, one third of this area is
covered by aerial images which are used for the
production of the digital city map on the one hand,
and for real land-use mapping on the other. Apart
from these regional applications, photogrammetry is
used for surveying the second Vienna water
pipeline, the Danube river, the roof landscape and
other projects. The administration of Vienna
manages its own photogrammetric department,
connected to a large information system with all
possibilities of visualization, established at the
central computing office of Vienna.
The smaller provincial capitals also apply photo-
grammetry periodically for the above-mentioned
purposes. Two interesting examples may be shown
referring to Graz (capital of Styria) and Salzburg.
In 1992 Graz performed a complete colour image
flight (730 images) at a scale of approx. 1:3,700
and in 1993 a flight along its main river, the Mur. By
means of these images a complete aero-
triangulation was carried out, and the results
(coordinates and parameters of orientation) were
stored in a respective data base. Using these data,
the evaluation of stereoscopic models is performed
by an analytical plotter with reference to actual
planning activities. Recently, the instrumentation for
digital photogrammetry was installed, and cor-
responding procedures are in development.
In good time (1972), the administration of Salzburg
started a project referring to a utility register. In
order to complete this basic information for a digital
city map, several flights (scale appr. 1:4,000)
providing a complete coverage of the Salzburg area
were carried out since 1992 . The evaluation is
performed by private photogrammetric offices under
4
the supervision of the municipal authority. The
project should be finished in 1996.
The capitals of all the other Austrian provinces are
working more or less in the same way.
D. RESEARCH INSTITUTIONS
In Austria there exist two important independent
institutions of general research. They are:
= Joanneum Research in Graz
— Austrian Research Center
Vienna
Besides other topics both are also working in the
fields of digital image processing and remote
sensing.
Seibersdorf near
1 Joanneum Research
Joanneum Research consists of 21 institutes. One
of them is the institute of Digital Image Processing
with the two departments of "Industrial. Image
Processing” and “Remote Sensing”. Both are
working in the fields of ISPRS related to Com. V
and Com. VII respectively.
1.1 Industrial Image Processing
This department works on the development of novel
vision systems for automating industrial production
control. Emphasis is put on drafting algorithms and
software systems which solve two-dimensional
inspecation tasks in real time. Apart from these 2D
developments, 3D measuring techniques (light
sectioning) are investigated. In this topic several
special projects were performed, as for example:
Planetary body high-resolution terrain models, 3D
navigation and reconstruction based on multiple
views, surface inspection by color recognition
algorithms, tunnel measuring using CCD cameras,
geometrical measuring with : high-resolution area
cameras and track measuring. The department
serves as a "partner in innovation" for business
enterprises focused on applied research in key
technologies.
1.2 Remote Sensing
The department processes all kinds of remote
sensing (active and passive) data. The high-
precision geometrical rectification of remote sensing
images based DTM's is its special forte.
Developments also have been related to the
stereoscopic extraction of 3D terrain information
from SAR image pairs and stereo-MOMS-data
using automated image matching techniques.
Moreover, investigations referring to SAR inter-
ferometry have been carried out recently. Another
research area is the development of new methods
and technologies to identify natural resources,
vegetation damage and natural risks. In this context
the following special topics were treated: Analysis of
land use, such as settlement zones, agricultural
land and forest types; classification of forest
damage and assessment of environmental risks,
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B6. Vienna 1996
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