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THE USE OF ANALYTICAL PLOTTERS FOR THE ESTABLISHMENT OF LAND IN- 
FORMATION SYSTEMS 
Ulrike Stampa-Wessel 
Institute of Photogrammetry and Engineering Surveys 
University of Hannover 
Federal Republic of Germany 
Commission Il, WG 11/2 
ABSTRACT 
The use of an analytical plotter for the establishment of a land information system is 
shown by means af the project "Neustadt". Described are those hard- and software corn- 
ponents which are necessary for the improvement and combination of aerial photographs 
in the scale 1:3300 with existing networks .-Problems of the visible and non-visible mat- 
ters are discussed. 
1. Introduction 
The application of an analytical plotter for the establishment of a land information sy- 
stem (LIS) is examined in the Institute of Photogrammetry and Engineering Surveys (IPI) 
at the University of Hannover. For this project the small town of Neustadt near Hannover 
was chosen. The multitude of informations in the urban area, collected and more or less 
updated by different administrations and companies, requires a LIS. Numerous. already 
existing maps have to be correlated on a geometrically correct basis. Therefore aerial 
photographs in a scale of 1:3300 were taken with a RMK 30/23 on a colour diapositive 
film. Signalized control points correlate the photographs with the local coordinate sy- 
stem. : 
2. Description of the Utilized Analytical Plotter 
  
All measurements from the aerial photographs are processed with the analytical plotter 
Kern DSR-1 (see fig.1). 
The electronic architecture of this instrument bases on a distributed concept. Several 
microprocessors are working on divided applications (see fig.2). The main control compu- 
ter is a POP 11/23 of the Digital Equipment Corporation (DEC). This microprocessor 
computes all programs for the DSR-1 operating system and communicates with ail other 
processors. The task of the processor P2 is to control the moving of the plates. There- 
fore the transformation parameters are down-loaded from the P1 into the plate pro- 
cessor P2. All motions of the operator are causing an order from P2 to the servo-mecha- 
nisms to move the plates 50 times per second. 
The processor P3 has to supervise the operator control panel (OCP). Informations from 
the P1 can be shown on the OCP, from where orders are transmitted by the P3 to 
the P1. 
The communication between user and the P1 proceeds by using an alphanumeric CRT 
and a keyboard. i 
For storing of programs and registered data a 20 Mbyte Winchester disk is available. 
For transferring data. a floppy disk unit is used. Connected by a telephone cable the 
facilities of.a DEC VAX 11/750 and from there those of the computing center RRZN 
may be applied. : 
Output units are the precision plotting table Kern GP-1, the interactive graphical screen 
of the IMLAC-terminal and a printer.