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FRG, unpublished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
ESA Scientific and Technical Publication Branch,
Nordwi jk, The Netherlands
Schoppmeyer,J.; 1983: Zum Zusammenhang der Aufnahmegenauigkeit und
Áquidistanz bei Hóhenliniendarstellungen
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- 91 =-