Geographic Information System-based watershed geomorphic mapping

The evolution process of geomorphic morphology is very long, and the geomorphic problems are very complex, so the measurement of geomorphology is very difficult. This exploration aims to enrich the description of comprehensive quantitative characteristics of watershed geomorphology, strengthen the research on the relationship among the fractal characteristics of geomorphology, the fractal dimension of geomorphology and the development of geomorphology, as well as the research on the fractal geomorphology model. The existing quantitative methods of watershed geomorphology have been fully studied. Then, the characteristics of the geomorphological quantitative description methods, such as mathematical statistics, correlation analysis and geomorphological single factor index, are comprehensively applied. The single factor index slope is introduced into the fractal model as an important feature information value of geomorphology. In the threedimensional space scanning box coordinate system, the three-dimensional cube boxes with different scales are used as statistical units to calculate the amount of ground undulation under the average slope of the surface, so as to construct the fractal three-dimensional feature information dimension Geographic Information System model to represent the degree of ground undulation. The results show that the scale-free region is limited by the altitude, so it is only suitable for the mountainous area with large slope and high-resolution digital elevation model data to obtain more statistical data. Moreover, the value of the fractal dimension is proportional to the average slope. This exploration provides some reference ideas for the study of watershed geomorphic mapping, and has a positive impact on the development of watershed geomorphic mapping.