矢量地表覆盖数据增量更新方法研究

发布时间：2018-07-15 22:29

【摘要】：地表覆盖数据是全球变化研究、生态环境评估、宏观调控分析等的重要依据,其现势性直接影响到相关研究与宏观决策的成败。由于地表矢量覆盖数据具有空间铺满、结构复杂等特点,现有数据更新方法难以实现其更新处理的自动化(或半自动化)。本文在分析了国内外有关增量更新研究进展的基础上,提出了一套矢量地表覆盖数据增量更新处理方案。主要研究工作包括： (1)在深入分析传统GIS数据组织模型的基础上,针对矢量地表覆盖数据更新处理的要求,设计了遵循OGC规范的矢量地表覆盖数据表达模型及相应的更新动态操作算子。 (2)分析了分类矢量化数据中大量碎多边形产生的原因及其特征,在此基础上提出了基于属性相似度的碎多边形聚合处理算法。通过实验比较了根据面积、属性相似度、相似度结合面积等聚合方法的优缺点,选取了适合地表覆盖数据更新处理的综合聚合方式。 (3)在分析现有增量信息组织与更新处理方法的基础上,设计并实现了一套基于拓扑关系的地表覆盖数据增量信息组织与更新处理方案。 (4)在Visual Studio2008开发环境下,从底层开发了一套地表覆盖数据增量更新原型系统,以陕西地表覆盖数据为例验证了本文模型与算法的可行性。
[Abstract]:Surface cover data is an important basis for global change research, ecological environment assessment, macro-control analysis and so on. Its current situation directly affects the success or failure of relevant research and macro-decision-making. Because the surface vector coverage data has the characteristics of space overlay and complex structure, it is difficult to realize the automation (or semi-automation) of the updating process by the existing data updating methods. Based on the analysis of the research progress of incremental updating at home and abroad, a set of incremental updating schemes for vector ground cover data is proposed in this paper. The main research work includes: (1) on the basis of deeply analyzing the traditional GIS data organization model, aiming at the requirement of vector ground cover data updating, The representation model of vector ground cover data and the corresponding update dynamic operation operator are designed in accordance with OGC specification. (2) the causes and characteristics of a large number of broken polygons in classified vectorized data are analyzed. On this basis, an algorithm for processing broken polygon aggregation based on attribute similarity is proposed. The advantages and disadvantages of aggregation methods based on area, attribute similarity, similarity and area are compared through experiments. A comprehensive aggregation method suitable for surface cover data update processing is selected. (3) based on the analysis of the existing incremental information organization and update processing methods, This paper designs and implements a set of incremental information organization and update processing scheme of ground cover data based on topological relation. (4) under Visual Studio 2008 development environment, a prototype system for incremental updating of surface cover data is developed from the bottom layer. The feasibility of the model and algorithm is verified by taking the surface cover data of Shaanxi province as an example.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208

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