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This article deals with a simple method to producephotomaps of as yet unsurveyed areas. Since a triangulationnetwork or a topographic inventory of the areasto be mapped did not exist, it was considered mostsuitable to produce some kind of «preliminary maps»:Maps of medium accuracy but high content of information which could be produced within a short timewith modest technical means and at low cost. Thefollowing procedure was found to be most suitable forthat purpose.A network of control points is established by meansof the slotted templet method. Aerial photographs,dodged by the Log Etronic procedure, are assembledto semicontrolled mosaics. Grestlines, plateau edgesand Symbols for mountain peaks, passes etc. as wellas spot heights, roads, tracks, wells, market places andnames of Settlements, districts and surface featuresare introduced into the photomosaics by means oftransparent overlays. This latter Information was collectedduring a three months' field survey in the YemenArab Republic

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