DEM based research on the landform features of China
文献类型：会议论文
| 作者 | Tang Guoan2; Liu, Aili2; Li Fayuan1; Zhou Jieyu2 |
| 出版日期 | 2006 |
| 会议日期 | OCT 28-29, 2006 |
| 会议地点 | Wuhan |
| 关键词 | DEM geomorphological parameter landform classification China |
| 卷号 | 6420 |
| DOI | 10.1117/12.712988 |
| 页码 | 64201Y |
| 国家 | PEOPLES R CHINA |
| 英文摘要 | Landforms can be described and identified by parameterization of digital elevation model (DEM). This paper discusses the large-scale geomorphological characteristics of China based on numerical analysis of terrain parameters and develop a methodology for characterizing landforms from DEMs. The methodology is implemented as a two-step process. First, terrain variables are derived from a 1-km DEM in a given statistical unit including local relief, the earth's surface incision, elevation variance coefficient, roughness, mean slope and mean elevation. Second, every parameter regarded as a single-band image is combined into a multi-band image. Then ISODATA unsupervised classification and the Bayesian technique of Maximum Likelihood supervised classification are applied for landform classification. The resulting landforms are evaluated by the means of Stratified Sampling with respect to an existing map and the overall classification accuracy reaches to rather high value. It's shown that the derived parameters carry sufficient physiographic information and can be used for landform classification. Since the classification method integrates manifold terrain indexes, conquers the limitation of the subjective cognition, as well as a low cost, apparently it could represent an applied foreground in the classification of macroscopic relief forms. Furthermore, it exhibits significance in consummating the theory and the methodology of DEMs on digital terrain analysis. |
| 源文献作者 | Gong, JY ; Zhang, JX |
| 产权排序 | 2 |
| 会议录 | GEOINFORMATICS 2006: GEOSPATIAL INFORMATION SCIENCE
 |
| 会议录出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
| 会议录出版地 | BELLINGHAM |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| ISBN号 | 978-0-8194-6529-0 |
| WOS记录号 | WOS:000245104000070 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/33516]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） |
| 通讯作者 | Tang Guoan |
| 作者单位 | 1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, No.9, Block 4, Renmingnan Road, Chengdu, Sichuan 610041, China 2.Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, No. 122, Ninghai road, Nanjing, Jiangsu 210097, China; |
| 推荐引用方式 GB/T 7714 | Tang Guoan,Liu, Aili,Li Fayuan,et al. DEM based research on the landform features of China[C]. 见:. Wuhan. OCT 28-29, 2006. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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