Group of the Geomorphological Mapping and Research for Xining Sheet
Through mapping of Xining sheet of 1:1,000,000 chinese geomorphic map,three points on the landform coloration can be summarized as follows. 1)A multi-map type,suited by many levels is adapted to explaine a current geomorphic map,because of showing much more geomorphic contents in general.In the Xining sheet of chinese geomorphic map,the two levels are accepted.The first one is that basic form-genetic types in the geomorphic map is explained by landform coloration instead of the technipue of area solid colour.Using different colours present the difference between edogenetic and exogenetic forces in geomorphie formation of the mapping area. As colours are chosen in practic,characters of exogenetie forces are explained by fully using colour pictographs and habits,and then differences between geomorphie types in quantity and degree are shown by different colour steps.When drawing with landform coloration,according to assuming beam light direction a certain colur tone in a certain geomorphic part occurs with dark and bright varying,to show stereo-sense of geomorphology.The second level is that different forms and textures are represented by colour symbols with landform coloration.When drawing the relationships between the two forms and sites should be noted.Comparing with the geomorphic map,expressed by solid colour method,the geomorphic map drawn by landform coloration is much more pitographic and active. 2)Based on what described above,geomorphic analysis about basic types such as,plains,plateforms,hills,low mountain,middle mountain and high mountain,and individual geomorphic subtypes have been executed.Stereo-form drawing method in geomorphic types of all has been also discussed in detail. 3)The print plate with colour-line symbols of landform coloration geomorphic map is drawn by using general mapping techniques and is divided into different printing subplates based upon design requirement.In the mean time,using a more advance electrie color scanner,a geomorphie map by landform coloration is duplicated and a print plate of landform coloration map is completed.Finally,combination of l.ne-drawing plate with landform coloration plate is printed in a suited way,and thus a landform coloration geomorphic map is produced.