地理空间元数据可视化研究与实践

发布时间：2018-02-25 18:19

本文关键词： 地理空间元数据信息可视化地理空间元数据可视化元数据服务可视化映射可视化评价　出处：《解放军信息工程大学》2013年硕士论文　论文类型：学位论文

【摘要】：地理空间元数据是空间信息基础设施的核心内容之一，传统的空间元数据服务在模式和效率上的缺陷，阻碍了地理信息资源的共享和普及。地理空间元数据可视化是信息可视化与元数据服务的有效结合，将会改进服务模式，提高可用性。本文基于信息可视化技术的特点，研究了地理空间元数据可视化的基本理论和实现方法，主要内容如下：（1）从系统概念出发，分析了传统的元数据服务在模式和效率上存在的不足，为本文的研究奠定了必要性基础。总结了信息可视化的技术和特点，并结合元数据检索的使用背景，研究了地理空间元数据单要素和多要素可视化方法及适用条件。（2）按照元数据服务模型中对象、用户和工具的构成要素，设计了地理空间元数据可视化的实现流程；总结了各个阶段的步骤和功能，构建了地理空间元数据可视化的逻辑模型。（3）研究了地理空间元数据可视化设计的主要内容。首先形成了用户、任务和元数据规格参数的三因素影响模型；总结已有的研究资料和分析现有服务平台的特点，细化了各项影响因素的具体内容。其次设计了用户与可视化界面、可视化视图之间两个方面的交互方式。最后提出了地理空间元数据可视化的应用模式，并与传统的元数据服务比较，分析了可视化模式的特点和优势。（4）重点研究了地理空间元数据可视化的实现过程。首先为建立元数据库，确定了元数据的表达形式、服务模式以及预处理步骤和存储模式等。其次为解决海量数据的有效显示，，从数据层次组织、空间关联属性获取和多样化检索方式三个方面来筛选过滤数据。研究了可视化的映射过程，建立了元数据信息与可视化因素的相互映射关系，实现了数据的定性与定量化表示。最后对三种主要的可视化技术，实现了绘制和交互算法。（5）实现了地理空间元数据可视化的原型系统，提出并细化了可视化评价的内容和指标，并在实验中进行了量化分析。从任务需求和用户两个方面，对比传统模式进行了评价测试，总结了系统存在的不足和改进方向。
[Abstract]:Geo-spatial metadata is one of the core contents of spatial information infrastructure. Geospatial metadata visualization is an effective combination of information visualization and metadata service, which will improve the service mode and increase the availability. This paper based on the characteristics of information visualization technology, The basic theory and realization method of geospatial metadata visualization are studied. The main contents are as follows:. 1) based on the concept of system, this paper analyzes the deficiency of traditional metadata service in mode and efficiency, which lays a necessary foundation for the research of this paper, summarizes the technology and characteristics of information visualization, and combines with the background of metadata retrieval. The visualization methods and applicable conditions of geospatial metadata single element and multi-element are studied. Secondly, according to the components of objects, users and tools in the metadata service model, the realization process of geospatial metadata visualization is designed, and the steps and functions of each stage are summarized, and the logical model of geo-spatial metadata visualization is constructed. (3) the main contents of the visualization design of geospatial metadata are studied. Firstly, a three-factor model of user, task and metadata specification parameters is formed, and the existing research data and the characteristics of the existing service platform are summarized. Secondly, the interaction between user and visual interface and visual view is designed. Finally, the application mode of geospatial metadata visualization is put forward. Compared with the traditional metadata service, the characteristics and advantages of the visualization mode are analyzed. Firstly, the metadata representation, the service model, the preprocessing steps and the storage mode are determined for the purpose of establishing the metadata database, and then the efficient display of the massive data is solved. Filtering data is filtered from three aspects: data hierarchical organization, spatial association attribute acquisition and multiple retrieval methods. The mapping process of visualization is studied, and the mapping relationship between metadata information and visualization factors is established. The qualitative and quantitative representation of the data is realized. Finally, the rendering and interactive algorithms are realized for the three main visualization technologies. Finally, the prototype system of geospatial metadata visualization is implemented, and the contents and indexes of visualization evaluation are proposed and refined, and the quantitative analysis is carried out in the experiment. Compared with the traditional model, the evaluation and test, summarized the shortcomings of the system and the direction of improvement.
【学位授予单位】：解放军信息工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208;TP391.41

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