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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