Abstract: Because of the complicated mountain land types in China, it is often difficult for the existing mountain land classification indexes to take all morphogenetic zones into account. As a result, indexes lose indicative significance in local regions. In order to establish altitude classification indexes with clear geographicalsignificance, the altitude characteristics of index surface features that could distinguish between mountain landlevel was analyzed in the paper through multi-source data, including SRTM, DEM, land cover, freeze-thaw erosion and river valleys. Based on the average altitude of index surface features, the classification planes with
equal attitude were formed through classification index objects (such as glacier and forest line) distribution elevation coincidence or adjacent multi-contour line circles. Besides, the mountain land was cut and divided. The values that each group of index object deviated from the plane with equal attitude were considered as the controlled quantity (control points). The classification reference surface was remonstrated via interpolation. The research highlighted the geographical significance of the indexes to the largest degree. The obtained results of mountain land classification was the most close to the distribution characteristics of mountain resources and environment system in China. It is hoped that the research can provide basic reference for the regionalization of mountain land that is oriented from the characteristics resource distribution.
Key words: mountain; classification indexes; reference surface; multi-source data
【source】Scientia Geographica Sinica2017年10期
