| Geomorphology is one of the most main factors of physical geographical environment, and its maps have been widely used in the scientific research, economic construction, eco-environmental protection, education and military affairs etc.Modern geomorphology and its mapping started in 1950's. In the last 50 years, Chinese scholars made great progress in regional geomorphology, geomorphologic mapping and other branches of geomorphology, formed comparative integrated scientific system, finished and published lots of geomorphologic maps with the different scales and regions. However only 15 sheets of geomorphologic maps (total 77 sheets, including land and ocean)with a scale of 1:1000 000 were finished and compiled in 1980's, and field geomorphologic surveying was the main traditional mapping methodologies, some geomorphologic borderlines were not exact, which cannot satisfy the objective demands. With the development and application of technology and methodology based on RS and GIS, lots of work can be finis'hed in indoors.Digital geomorphology is based on traditional methods of geomorphologic mapping and geographic information system (GIS). The article formulates the technical routes and methods of 1:1000 000 digital geomorphologic mapping in China based on RS and GIS, with an example of digital geomorphologic map, G-48, Kunming. And then discussed some issues in the digital geomorphologic mapping: technology of basic geomorphology based on DEM, defining boundary of mesa and hill and the plain along the rivers, quantitative inspection of basic geomorphology. Analysis shows that: Digital geomorphology based on RS and GIS will improve the efficiency and quality of geomorphologic mapping.
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