scale slope 
a «9? a «269 a «159 
1: 50.000 10 10 20 
1:100.000 10 20 40 
1:200.000 25 50 50 
Table 6 : contour interval for german sample maps 
Comparing these pre-requisites with the attained accuracy for the corre- 
lation the use of the filtered heights for mapping purposes in a scale 
of 1:200.000 seems to be possible. To assure this opinion some more 
investigations with point classifications according to the above slope 
categories are recommendable. However, the results for the correlation 
are already very close to the application in small scale topographic 
mapping. 
ACKOWLEDGEMENT 
We kindly want to acknowledge the support of the Geographie Office of 
the German Forces which provided the digital terrain model and the 
navigation maps. In particular we want to thank Dr. F.-J. Lohmar for his 
personal effort. Furthermore we want to express our gratitude to the 
Astronomie Institute in Münster for the friendly permittment to use the 
PDS 2020 mierodensitometer, specially Mr. D. Teuber for his support 
during the campaigns. 
REFERENCES 
Boochs,F.; 1984a: Ein Verfahren zur Herstellung digitaler Hóhenmodelle 
aus  photogrammetrischen Stereoaufnahmen mit Hilfe 
der flàáchenhaften Korrelation in digitalen Bildern 
DGK, series C, Nr. 299, Munic, FRG 
Boochs,F.; 1984b: Geometrische Leistungsfähigkeit von Trommelscannern 
- Anspruch und Wirklichkeit 
International Archives for Photogrammetry and Remote 
Sensing, Vol. XXV, Part A2, p. 68-76 
Decker,R.; 1986: Digitale Korrelation von Mef&bildern aus dem Weltraum 
Diplom thesis, Institute for Photogrammetry Bonn, 
FRG, unpublished 
Guyenne,T.D., Hunt,J.J. (Ed.); 1985: Metric Camera Workshop 
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Nordwi jk, The Netherlands 
Schoppmeyer,J.; 1983: Zum Zusammenhang der  Aufnahmegenauigkeit und 
Áquidistanz bei Hóhenliniendarstellungen 
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- 91 =-