多源多尺度DEM地表形态精度量化分析研究

项目名称： 多源多尺度DEM地表形态精度量化分析研究

项目编号： No.41201415

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地理学

项目作者： 陶旸

作者单位： 滁州学院

项目金额： 25万元

中文摘要： 地表形态是派生一切地形信息的本源。现有的DEM质量分析主要关注于DEM的高程数值精度，面对当前丰富的多种来源、多种尺度DEM数据，缺乏有效技术分析和评价其地表形态精度，已成为推演DEM应用不确定性的瓶颈问题。本课题将综合运用定性与定量、宏观与微观、解析与综合相结合的研究方法，以地貌类型多样的陕西省为例，从高程高低序列关系、局地坡面凸凹特征、区域地形空间关系、宏观地形结构特征等视角，研究DEM地表形态误差的概念模型与描述指标，剖析DEM地表形态误差的形成机理，构建具有地形信息认知特色的信息图谱型序列尺度DEM地表形态精度评价标准，建立基于空间场模型的DEM地表形态精度量化分析方法，研发DEM地表形态精度评价原型系统，重点解决多源多尺度DEM地表形态精度评价与可用性分析问题。本研究将进一步完善DEM地形描述真实性评价的理论与方法，有力提升序列尺度DEM的建设能力与应用水平。

中文关键词： 数字高程模型；地表形态精度；数字地形分析；误差场；数据质量评价

英文摘要： The existing researches of DEM quality analysis mainly focuses on the accuracy of elevation value. Nowadays, DEMs are constructed from multi sources such as contour digitalization, Lidar based altimetry and so on. As their multi scale and multi sources characteristics, there are less effective technologies which could analyze and assess the morphology accuracy of DEMs. It may become the technology bottleneck of the DEM uncertainty evaluation. In this research, based on the comprehensive application of qualitative and quantitative methods, macroscopic and microscopic methods, analytical and comprehensive methods, Shaanxi province with various kinds of landforms are taken for example. With the perspective of high-low sequence of elevation, convex and concave characteristics of local slope, spatial relationship of local terrain, structural characteristics of macro-relief, the research containsthe following parts: studying on the concept model and accuracy index of DEM surface morphological errors, analyzing the formation mechanism of DEM surface morphological errors, constructing the information map type evaluation criterion of DEM surface morphological accuracy with the characteristics of terrain information cognition, establishing the quantitative method of DEM surface morphological errors based on space field mo

英文关键词： Digital Elevation Model；landform morphology accuracy；Digital Terrain Analysis；error field；data quality assessment