Aerial photographs taken from the watershed of the Lokos rivulet Megye Nograd, the Kisasszony forest in the Bugac area, the Visegrad-Nagyvillam area, and of some other areas in Hungary were interpreted with the aid of the stereoscope. The maps were presented and discussed. The techniques involved in interpretation of the photographs with the aim of establishing the altitude fluctuations were described in detail. The results were utilized in soil-erosion studies. Author
Edited trans. of Geodezia es Kartografia (Hungary) v17 n2 p116-122 1965, by D. Grandjean.