面向城市DEM构建的地形要素分类及表达

发布时间：2018-11-11 11:19

【摘要】：地形要素是对地形在地表的空间分布特征具有控制作用的点、线或面状要素,其合理划分可为城市地形建模提供数据基础。本文在解析城市地形特征和分析现有地形图分类在城市DEM建模中不足的基础上,基于面向对象思想,以城市地形被城市道路网分割为基本原则,构建了城市地形要素分类及表达方法,并以南京市某区1:500地形图为实验数据,进行了相关验证实验与分析。实验结果表明,本文提出的地形要素分类和表达方法能够整体控制并有效表达集几何和语义信息为一体的复杂城市地形,在全局和局部地形上均有较好的建模效果。本文提出的城市地形要素分类及表达方法不但可为地形要素的分析和应用提供基础,也可为城市地形构建模拟、建设规划和分析决策等提供技术支撑。
[Abstract]:Terrain elements are the points, lines or surface elements that control the spatial distribution of terrain on the surface. The reasonable division of terrain elements can provide the data basis for urban terrain modeling. In this paper, based on the analysis of urban terrain features and the deficiency of existing topographic map classification in urban DEM modeling, based on the object-oriented idea, the urban terrain is divided by urban road network as the basic principle. The classification and expression method of urban topographic elements were constructed, and the experimental data of 1: 500 topographic map in a certain area of Nanjing city were used as experimental data, and the relevant verification experiments and analysis were carried out. The experimental results show that the proposed classification and representation method of terrain elements can control and effectively represent the complex urban terrain which integrates geometric and semantic information, and has a good modeling effect on both global and local terrain. The classification and expression method of urban terrain elements presented in this paper can not only provide the basis for the analysis and application of topographic elements, but also provide technical support for the simulation of urban terrain construction, construction planning and analysis decision.
【作者单位】：滁州学院安徽地理信息集成应用协同创新中心;南京市测绘勘察研究院有限公司;
【基金】：国家自然科学基金项目(41501445) 安徽省自然科学基金项目(1608085QD77) 安徽省高校自然科学研究项目(KJ2015B13、KJ2015A261) 滁州学院科研基金项目(2014KJ02)
【分类号】：P208

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