DIFFERENT METHODS OF DETAILED GEOMORPHOLOGICAL MAPPING (with coloured example)* by H. J. VAN DORSSER and A. I. SALOME** Introduction Over the past fifteen years a large number of Systems of geomorphological mapping have been proposed. Several of these Systems have been analysed by a group of advanced students in physical geography. Following this analysis five methods were selected. Each of these methods was used for detailed geomorpho logical mapping of the same test area. The map scale in each case is 1:25,00g.1 The methods used 1Method of Annaheim and Moser. This system has been designed for mapping in Switzerland. On a grey tone print of the topographic map, the hydrography, the accumulation forms and the forms of erosion and denudation are entered in blue, green and red respectively. Man-made features of an accumulative or denudative nature may also be indicated in the colours green and red respectively. Other forms resulting from man's activities are marked in black. The chronology of the mapped features is indicated by the symbol. 2. Method of the Czechoslovak Academy of Sciences (Demek). The original legend of this method was designed for use in Czechoslovakia. A simplified topographic map on which the main roads and built-up areas are indicated in black and the contour lines in brown is used as the base map on which the accumulation forms and the erosional and denudational forms have been entered. Colours are used for indicating both the map units and the chrono logy. Other chronological data appear on the map in letter symbols. The boundaries between the different units are marked by black lines. The rivers are drawn in blue. The man-made forms are marked in black except for the 'hollow ways' which are marked in red. 3. Method of the Polish Academy of Sciences (Klimaszewski). This method has been designed for the detailed geomorphological mapping of Poland. The base map as used in the example published by Gilewska (1963) only contains contour lines in brown. All landforms, classified, have been divided into groups of destructional forms and groups of constructional forms according to a system in which a rather com- plicated genesis is given. Colours have been used for the chronology and tones of one colour indicate the classes of slope. Man-made forms are marked in black. 4. ITC-system of geomorphological survey (Ver stappen and Van Zuidam). This has been designed as a universal system. The base map is a simplified topographic map printed in grey. The same colour is used for indicating the lithology. Contrary to the other Systems, which are mainly based on forms of accumul ation and erosion, this mapping system is based on geomorphological units which are indicated in colour. The chronology is given by letter symbols. Rivers are mapped in blue. All other symbols are in black. The legend of the system is kept flexible, but in our opinion 71 We wish to express our sincere thanks to the Carto- graphy Department of the ITC, under Professor Ormeling, for printing the coloured maps. Dr. H. J. van Dorsser and Dr. A. I. Salome, Geo graphica! Institute, Utrecht State University. K.N.A.G. Geografisch Tijdschrift VII (1973) Nr. I

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Kartografie | 1973 | | pagina 9