Using DEM data with 1:50 000 as research materials, this paper focuses on the landform taxonomic features of Hunan Province of China. Firstly, this paper decides on the optimum analysis window with 21 * 21 sizes, which is about equal to 0. 28 kmz in study area. Secondly, this paper employs three indices as classifying metrics, such as relief, surface incision and TPI, respectively. With these indices, the paper forms a taxonomic framework for landforms in study area. According to experiment, this paper gets 12 basic types for study area. Last...