| 栅格数字地形分析中的尺度问题研究方法简 |
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| 引用本文： | 秦承志,呼雪梅.栅格数字地形分析中的尺度问题研究方法简[J].地理研究,2014,33(2):270-283. |
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| 作者姓名： | 秦承志 呼雪梅 |
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| 作者单位： | 1. 中国科学院地理科学与资源研究所, 资源与环境信息系统国家重点实验室, 北京 100101;
2. 中国科学院大学, 北京 100049 |
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| 基金项目： | 中科院地理资源所“秉维优秀青年人才计划”资助（2011RC203）；国家科技支撑计划（2013BAC08B03-4） |
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| 摘 要： | 栅格数字高程模型（DEM）固有的尺度特征给以栅格DEM为基本输入的数字地形分析带来各种尺度问题。对栅格数字地形分析中涉及的尺度进行梳理，以分辨率和分析窗口为重点，对栅格数字地形分析中的多尺度表达、尺度效应、适宜尺度选择、尺度转换等尺度问题及其相互关系进行阐述；分别介绍各类尺度问题的现有定量研究方法，尤其对尺度效应定量刻画和适宜尺度选择方法，根据不同方法计算定量指标所利用的信息类别进行分类归纳；最后讨论了其中有待进一步开展研究的几方面工作。
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| 关 键 词： | 栅格DEM 数字地形分析 尺度 分辨率 分析窗口 |
| 收稿时间： | 2013-06-12 |
Review on scale-related researches in grid-based digital terrain analysis |
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| QIN Chengzhi,HU Xuemei.Review on scale-related researches in grid-based digital terrain analysis[J].Geographical Research,2014,33(2):270-283. |
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| Authors: | QIN Chengzhi HU Xuemei |
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| Institution: | 1. State Key Lab of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The scale-dependent characteristics in gridded digital elevation model(DEM) cause scale-related problems to digital terrain analysis(DTA). In this paper, we first introduce main types of scales in DEM and DTA. Focusing on resolution and neighborhood size, we summarize four types of main scale-related problems in DEMs and DTA(i.e. multi-scale representation, scale effect characterization, appropriate scale determination, and scale transformation) and describe the relationships among these four problems. Then the quantitative research methods for each kind of scale problems are reviewed. Particularly, the quantitative methods for scale effect characterization and appropriate scale determination are classified according to different categories of information used for computing quantitative indicators. As a conclusion, we list key research issues in this field. |
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