Object-oriented method based research on classification of relief form of China

DEM availability and GIS-assisted processing of DEM have brought accelerated development of geomorphometry to a great extent. Based on analysis of the GTOPO30 DEM and its derivations (six terrain factors), relief form of China is classified. This method takes each terrain factor as a single-band image and combines the six single-band images into a multi-band image. Then object-oriented classification way of remote sensing image processing is applied for landform classification based on the multi-band image. Taken the Geomorphologic Map of China and Its Adjacent Areas (1∶4,000,000) as reference, the classified result matches it well and displays more integrated. This experiment shows that integrative application of digital terrain analysis and remote sensing classification technology has broad application prospect in landform classification. It is also significant to consummating the theory and methodology of digital terrain analysis.