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Geographica Helvetica
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Volume 31, issue 1
Geogr. Helv., 31, 33–38, 1976
https://doi.org/10.5194/gh-31-33-1976
© Author(s) 1976. This work is distributed under
the Creative Commons Attribution 3.0 License.
Geogr. Helv., 31, 33–38, 1976
https://doi.org/10.5194/gh-31-33-1976
© Author(s) 1976. This work is distributed under
the Creative Commons Attribution 3.0 License.

  31 Mar 1976

31 Mar 1976

Herstellung von Luftbildkarten in der Provinz Ta'izz (Arabische Republik Jemen)

H. Steffen H. Steffen
  • Geographisches Institut der Universität, Blümlisalpstraße 10, 8006 Zürich, Switzerland

Abstract. This article deals with a simple method to produce photomaps of as yet unsurveyed areas. Since a triangulation network or a topographic inventory of the areas to be mapped did not exist, it was considered most suitable to produce some kind of «preliminary maps»: Maps of medium accuracy but high content of information which could be produced within a short time with modest technical means and at low cost. The following procedure was found to be most suitable for that purpose. A network of control points is established by means of the slotted templet method. Aerial photographs,dodged by the Log Etronic procedure, are assembled to semicontrolled mosaics. Grestlines, plateau edges and Symbols for mountain peaks, passes etc. as well as spot heights, roads, tracks, wells, market places and names of Settlements, districts and surface features are introduced into the photomosaics by means of transparent overlays. This latter Information was collected during a three months' field survey in the Yemen Arab Republic.

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