| 基于DEM的新疆地势起伏度分析 |
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| 引用本文： | 王玲,吕新. 基于DEM的新疆地势起伏度分析[J]. 测绘科学, 2009, 34(1): 113-116. DOI: 10.3771/j.issn.1009-2307.2009.01.038 |
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| 作者姓名： | 王玲 吕新 |
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| 作者单位： | 石河子大学师范学院地理系,新疆石河子,832003;新疆兵团绿洲生态农业重点实验室,石河子大学,新疆石河子,832003 |
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| 基金项目： | 石河子大学"263"青年骨干教师资助项目 |
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| 摘 要： | 地势起伏度的提取为获取地表信息、进行地形定量化分析提供有效手段。本研究以新疆1:25万DEM数据为基础,并借鉴前人研究方法,在GIS系统的支持下,利用邻域分析方法,运用均值变点分析法对其进行了最佳统计单元的计算,最后得出基于1:25万DEM的新疆地势起伏度计算的最佳统计单元为8×8的网格大小(2.56km2),并完成了新疆地势起伏度分级图的绘制,通过分级图认真分析新疆基本地貌特征(戈壁、沙漠、丘陵、高山等),从地势上看,新疆地势局部起伏较大,总体较平缓。
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| 关 键 词： | 地势起伏度 DEM 邻域分析 最佳统计单元 |
Analysis of the relief amplitude in Xinjiang based on digital elevation model |
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| WANG Ling,LU Xin. Analysis of the relief amplitude in Xinjiang based on digital elevation model[J]. Science of Surveying and Mapping, 2009, 34(1): 113-116. DOI: 10.3771/j.issn.1009-2307.2009.01.038 |
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| Authors: | WANG Ling LU Xin |
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| Abstract: | The extraction Relief Amplitude provides effective means for the access to surface information and the quantitative analysis of the terrain.On the basis of the Xinjiang 1∶250 000 DEM data and previous research,with the support of the GIS system,using the neighborhood analysis,and applying mean of change-point analysis,the computation of best statistical unit is performed.Then the best statistical unit of the Xinjiang Relief Amplitude calculation based on 1∶250 000 DEM is obtained,which is the 8 × 8 mesh size(2.56km2).Finally the Xinjiang Relief Amplitude grade was drawn.Through the careful analysis on Xinjiang's geomorphologic features(Gobi,Desert,Desert,hills,mountains,etc.),Xinjiang local undulating terrain is larger,more gentle overall. |
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| Keywords: | DEM |
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