MAPGIS支持的多源历史空间数据展示平台设计研究

发布时间：2018-05-13 20:49

本文选题：多源历史空间数据组织 + 空间数据发布　；参考：《北京建筑大学》2015年硕士论文

【摘要】：二三维一体的、基于互联网的多源历史空间数据展示平台目前并不完善,如何实现一个能通过Web端浏览访问的、展示多源历史空间信息的平台是主要目标。论文就其设计出发,对其中一些关键技术进行了研究,并通过实例进行了验证。通过不同历史时期影像数据的叠加展示城市历史变迁,并引入三维模型的发布,直观逼真地展示历史建筑详细信息,并在此基础上实现用户自定义检索、路径分析等实用功能,由于数据的多源特性,实现起来存在很多困难。展示历史变迁需要大量的高分辨率影像数据,对其进行瓦片裁剪时级数要求高,导致裁剪速度慢;多源数据包括影像数据、矢量数据及模型数据,多种类型数据的存储及调用也较为复杂;影像数据只具有位置信息,不具备属性信息,无法与兴趣点(Point of interest)产生关联,因此无法直接进行兴趣点的检索;由外部软件创建的三维模型不具备空间属性信息,无法准确定位发布。此外,所有的数据均通过Web端进行访问,大数据的网络传输会导致平台运行较慢等问题。本文针对平台的实际需求,对空间信息的数据组织、发布展示的相关技术进行了总结,并在此基础上,对其中几项关键技术进行了深入研究,提出“多服务器分布式瓦片裁剪技术”,将分布式概念引入瓦片裁图技术中,实现了影像数据裁剪的分布式,提高了裁图效率;运用多级缓存机制,通过在用户端开辟缓存文件存储及服务器端三维模型队列的方法,提高了数据利用率,尽可能减少了网络传输的数据量,提高了平台显示效率;通过使用JCR内容仓库的JCR-170 API实现了多源数据的统一调用,提高了数据检索及调用效率;采用创建矢量模型的方式建立了影像数据和属性数据的传递,达到基于影像的空间检索目的,并通过XML记录三维模型目标位置坐标信息,实现了三维模型的定位发布。最后通过Map GIS支持的多源历史空间数据展示平台的实现,以北京市为例,对其部分历史空间数据进行了发布展示,证实了其可行性。
[Abstract]:The multi-source historical spatial data display platform based on Internet is not perfect at present. How to realize a platform that can browse and access through Web terminal and display multi-source historical spatial information is the main goal. In this paper, some key technologies are studied and verified by examples. Through the superposition of the image data of different historical periods to display the historical changes of the city and introduce the release of 3D model, the detailed information of historical buildings can be displayed intuitively and lifelike. On this basis, the practical functions of user-defined retrieval, path analysis and so on are realized. Because of the multi-source characteristic of data, there are many difficulties in implementation. Displaying historical changes requires a large number of high-resolution image data, and the series requirements for tile clipping are very high, which results in slow cutting speed. The multi-source data include image data, vector data and model data, and the multi-source data include image data, vector data and model data. The storage and transfer of many kinds of data is also more complicated, the image data only has the position information, does not have the attribute information, cannot produce the association with the interest point of interest, therefore cannot carry on the interest point retrieval directly; The 3D model created by external software does not have spatial attribute information and can not be accurately located and published. In addition, all the data are accessed through the Web terminal, and the network transmission of big data will cause the platform to run slowly. According to the actual demand of the platform, this paper summarizes the data organization of spatial information and the related technology of publishing and displaying. On this basis, it makes a deep research on several key technologies. This paper puts forward the "multi-server distributed tile clipping technology", which introduces the distributed concept into the tile clipping technology, realizes the distributed image data clipping, improves the efficiency of clipping, and applies the multi-level cache mechanism. By opening cache file storage and server-side 3D model queue in the client side, the data utilization rate is improved, the amount of data transmitted in the network is reduced as much as possible, and the display efficiency of the platform is improved. The unified transfer of multi-source data is realized by using JCR-170 API of JCR content warehouse, and the efficiency of data retrieval and transfer is improved, and the transfer of image data and attribute data is established by creating vector model. The goal of spatial retrieval based on image is achieved, and the location and publication of 3D model is realized by recording the position coordinate information of 3D model by XML. Finally, through the realization of multi-source historical spatial data display platform supported by Map GIS, taking Beijing as an example, some of its historical spatial data are published and displayed, which proves its feasibility.
【学位授予单位】：北京建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P208

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