[1]杨颖楠,李子夫,刘梦云,等.基于不同分辨率DEM的永寿县地形信息差异分析[J].水土保持研究,2018,25(06):131-136.
　YANG Yingnan,LI Zifu,LIU Mengyun,et al.Analysis of Topographic Differences of Yongshou County Based on Different Resolutions of DEM[J].Research of Soil and Water Conservation,2018,25(06):131-136.
点击复制

基于不同分辨率DEM的永寿县地形信息差异分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年06期 页码: 131-136 栏目: 出版日期: 2018-10-26
Title:
Analysis of Topographic Differences of Yongshou County Based on Different Resolutions of DEM
作者:
杨颖楠1,2, 李子夫1,2, 刘梦云1,2, 张杰1,2, 张萌萌1,2, 杨静涵1,2, 曹润珊1,2
1. 西北农林科技大学 资源环境学院, 陕西 杨凌 712100;
2. 农业部 西北植物营养与农业环境重点实验室, 陕西 杨凌 712100
Author(s):
YANG Yingnan1,2, LI Zifu1,2, LIU Mengyun1,2, ZHANG Jie1,2, ZHANG Mengmeng1,2, YANG Jinghan1,2, CAO Runshan1,2
1. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Northwest Key Laboratory of Plant Nutrition and Agricultural Environment, Ministry of Agriculture, Yangling, Shaanxi 712100, China
关键词:
DEM分辨率; 永寿县; 地形信息
Keywords:
resolution of DEM; Yongshou County; topographic information
分类号:
P208
摘要:
高分辨率的DEM往往可以囊括更多更详细的地形信息，但过于详细的数据可能会造成数据冗余给计算带来不便。为了研究不同分辨率的数字高程模型（DEM）在对地形信息表达的现实意义，基于不同比例尺、不同栅格空间分辨率的DEM进行了地形特征的提取与分析，结果表明：（1）地面整体坡度随着分辨率降低逐渐减小，对地形的描述越来越粗糙，概括性越来越高，地形整体趋于平坦化。（2）基于较小分辨率DEM提取的坡向更具有宏观意义，而高分辨率DEM提取的坡向可反映地形的细部朝向。（3）随着DEM分辨率下降，地面平面曲率能更加概括区域地形，使山谷线和山脊线更明显，但会导致大量细部信息的丢失。（4）DEM所提取的地面剖面曲率值随着DEM分辨率的下降显著减小，即地面坡度的变化减小，地面的转折棱角逐渐趋于平滑，地形起伏变化特征精度降低。
Abstract:
High-resolution DEM can include more detailed topographical information, but the excessively detailed data could make it redundant and even cause data to be inconveniently calculated. In order to research whether different levels of resolution of the DEM (digital elevation models) has a very important practical significance on the terrain information expression, based on different scales and different resolutions of DEM, we extracted and analyzed topographical feature. The results showed that: (1) with the gradual reduction of resolution of DEM, the overall slope of the ground was decreasing, the description of the terrain was getting rough, and the topography became more and more coincident, the terrain tended to be more flattened; (2) the slope extracted from low resolution of DEM had better macro meaning, while the slope extracted from high resolution of DEM could reflect the fine orientation of the terrain; (3) with the reduction of the resolution of DEM, surface curvature could generalize regional topography better, and the mountain ridge line and valley line would be more obvious, but this would lead to loss of a lot of detail information; (4) with the decrease of the DEM resolution, the profile curvature information extracted from DEM would be dropped significantly, in other words, the decrease of the DEM resolution made the variety of terrain slope less, the turning point of the ground tend to be smooth gradually, and the characteristic of the topographic fluctuation reduce.

参考文献/References:

[1] 陈楠,汤国安,刘咏梅,等.基于不同比例尺的DEM地形信息比较[J].西北大学学报:自然科学版,2003,33(2):237-240.
[2] Mallet C, Bretar F. Full-waveform topographic lidar:State-of-the-art[J]. Isprs Journal of Photogrammetry & Remote Sensing, 2009,64(1):1-16.
[3] 汤国安.我国数字高程模型与数字地形分析研究进展[J].地理学报,2014,69(9):1305-1325.
[4] 谢轶,群汤国,安江岭. DEM提取坡向变率中的误差特征与消除方法[J].地理与地理信息科学,2013,29(2):49-53.
[5] 杨勤科,贾大韦,李锐,等.基于DEM的坡度研究:现状与展望[J].水土保持通报,2007,27(1):146-150.
[6] 陈楠,林宗坚,李成名,等.基于信息论的不同比例尺DEM地形信息比较分析[J].遥感信息,2004(3):5-9.
[7] 汤国安,赵牡丹,李天文,等.DEM提取黄土高原地面坡度的不确定性[J].地理学报,2003,58(6):824-830.
[8] 陈楠,王钦敏,汤国安.黄土高原坡向信息量变化与DEM分辨率的关系[J].高技术通迅,2008,18(5):525-530.
[9] 杨昕.基于DEM地形指数的尺度效应与尺度转换[D].南京:南京师范大学,2007.
[10] 杨勤科,Jupp D,郭伟玲,等.基于滤波方法的DEM尺度变换方法研究[J].水土保持通报,2008,28(6):58-62.
[11] 李抗彬,沈冰,李智录.DEM数据分辨率对黑河金盆水库流域地形参数提取的影响分析[J].西安理工大学学报,2012,28(2):127-131.
[12] 陈楠.DEM分辨率与平均坡度的关系分析[J].地球信息科学学报,2014,16(4):524-530.
[13] 刘学军,龚健雅,周启鸣,等.基于DEM坡度坡向算法精度的分析研究[J].测绘学报,2004,33(3):258-263.
[14] 刘学军,龚健雅,周启鸣,等.DEM结构特征对坡度坡向的影响分析[J].地理与地理信息科学,2004,20(6):1-5.
[15] 贾志成,杨光,杨国苑.基于不同精度DEM的黄土丘陵沟壑区地形指标提取误差分析[J].安徽农业科学,2008,36(5):2147-2148.
[16] 陈楠.剖面曲率精度变化与DEM分辨率关系[J].中国矿业大学学报,2013,42(1):147-151.
[17] 呼雪梅,秦承志.地形信息对确定DEM适宜分辨率的影响[J].地理科学进展,2014,33(1):50-56.
[18] 周启鸣,刘学军.数字地形分析[M].北京:科学出版社,2006.
[19] 刘娜,杨斌斌,房靖楠,等.DEM分辨率对地形因子提取影响的研究[J].森林工程,2016,32(6):57-60.
[20] 朱雪龙.应用信息论基础[M].北京:清华大学出版社,2001.
[21] 朱伟,王东华,周晓光.基于信息熵的DEM最佳分辨率确定方法研究[J].遥感信息,2008(5):79-82.

相似文献/References:

[1]徐静,任立良,阮晓红.不同地形复杂度下的水文尺度效应研究[J].水土保持研究,2010,17(01):35.
　XU Jing,REN Li-liang,RUAN Xiao-hong.Hydrologic Responses to Spatial Scale in the Area with Different Terrain Complexity[J].Research of Soil and Water Conservation,2010,17(06):35.
[2]丁辉,陈亚宁,刘铁军,等.TOPMODEL模型拓展及改进[J].水土保持研究,2007,14(05):183.
　DING Hui,CHEN Ya-ning,LIU Tie-jun,et al.Development and Improvement of TOPMODEL[J].Research of Soil and Water Conservation,2007,14(06):183.
[3]王峰,王春梅.地形因子与DEM分辨率关系的初步研究——以蒙阴县为例[J].水土保持研究,2009,16(04):225.
　WANG Feng,WANG Chun-mei.Research for the Influences of DEM Resolution on Topographical Factors—A Case Study of Mengyin County[J].Research of Soil and Water Conservation,2009,16(06):225.

备注/Memo

收稿日期:2017-11-28;改回日期:2018-01-04。
基金项目:国家重点研发计划（2016YFC0501703-05）；陕西省自然科学基础研究计划（2017JZ008）
作者简介:杨颖楠(1997-),女,陕西西安人,本科生在读,研究方向为地理信息科学。E-mail:18821670730@163.com
通讯作者:刘梦云(1973-),女,陕西蒲城人,副教授,博士,博导,主要从事土地生态恢复研究。E-mail:lmy471993@163.com

更新日期/Last Update: 1900-01-01