Contents and forms of land information systems are being dis- 
cussed for many years. But it is a fact that not one single 
system can be produced, in which all land related data are 
stored and which satisfies all different requirements of nu- 
merous applications. A subdivision in different subsystems is 
necessary, eather by aereal limitations or by task related 
limitations. 
That means that a selection of all land related data has to 
be made as well as a desired mapscale and it's range, accu- 
racy requirements for the data and thereby, indirectly, the 
data collection methods. These selections result in a speci- 
fication of different land related information systems. 
In contrast to e.g. geographic land information systems or 
pure planning information systems the project 'Neustadt', 
which this article still relates on lateron, is to be seen 
as a subsystem of an urban land information system because 
of it's data, it's users and it's data collection methods. 
Considering some special problems of the referred example, 
photogrammetric methods for data collection as well as methods 
for their processing and presentation will be explained. 
In all cases the relation to already existing data of the 
land information system has to be considered. 
2. Data Collection 
One of the main tasks to establish a land information system 
and to keep it on a high level of actuality is the data collec- 
tion. If this data collection is performed by different survey- 
ing methods, which result in one model of reality, this system 
is called an integrated land information system. 
The photogrammetry plays a major role for these tasks. On the 
one hand a fast and homogenous densification of the network 
is possible, on the other hand detail surveyings are performed 
in the stereomodels. 
A continous dataflow as well as an active application of al- 
ready existing data increases the effectiveness of the 
measurements and eases the processing. 
Already when measuring fiducial coordinates during an aero- 
triangulation, stored point coordinates can be very helpful. 
If the orientation of the images is roughly known, passpoints 
as well as tie- and controlpoints can nearly be approached. 
Those points can be taken over out of the land information 
system as shown in figure 2. 
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