矢量地图局域非线性变换技术研究

发布时间：2018-03-14 07:18

本文选题：GIS　切入点：数据保密性　出处：《哈尔滨工程大学》2013年硕士论文　论文类型：学位论文

【摘要】：近年来，以数字化、网络化为特征的信息化浪潮席卷全球，各种数字产品应运而生，地理信息系统（GIS）更是得到了前所未有的发展，已经深入到社会的各行各业中。但矢量地图数据的保密性和安全性却成为我国GIS技术发展的瓶颈，使我国的GIS技术呈现出普及率低和分辨率低的特点。所谓普及率低是指高精度地图数据主要集中在政府部门和科研机构中使用；分辨率低是指我国商用和民用的数字地图都是不大于1：25000的小比例尺地图，，大比例尺地图因涉及国家安全而被严格控制。所以，如何保证矢量地图数据的保密性和安全性，如何使得高精度、大比例尺地图数据服务于经济和社会建设已成为一项亟需解决的问题。针对矢量地图数据的安全保密问题，如今主要采用隐藏技术实现地图的分类制图和使用，即在制图的时候将地图分为军用类、政府类、民用类等，从而使地图中的敏感信息得到保护，但这种技术耗费的成本较高且效率很低。针对矢量地图数据的安全保密问题以及现今技术存在的缺陷，地图变换技术应运而生。地图变换是指在保证地图拓扑结构不变的基础上，对地图中的敏感数据进行不可逆的变换，对地图数据进行降密或脱密处理。本文所研究的矢量地图局域非线性变换技术结合了地图投影技术和平行投影技术，对敏感数据所在的区域进行非线性变换，对不包含敏感信息的区域不进行处理，保证矢量地图中敏感数据的安全。实验结果证明，局域非线性变换技术在保证矢量地图拓扑结构不变性、地图可用性和变换不可逆性的基础上，有效的保障了矢量地图的安全性和保密性，使得经过本技术处理后的高精度、大比例尺地图数据能很好的为商用和民用服务，具有较高的实用价值。
[Abstract]:In recent years, with the digital, network as the characteristics of the wave of information swept the world, all kinds of digital products came into being, geographic information system (GIS) has been an unprecedented development. But the confidentiality and security of vector map data have become the bottleneck of the development of GIS technology in our country. The GIS technology of our country shows the characteristics of low popularization rate and low resolution. The so-called low popularization rate means that the high precision map data is mainly used in government departments and scientific research institutions. Low resolution means that both commercial and civilian digital maps in our country are small scale maps of not more than 1: 25000. Large scale maps are strictly controlled because they involve national security. Therefore, how to ensure the confidentiality and security of vector map data, How to make the high precision and large scale map data serve the economic and social construction has become an urgent problem. In view of the problem of security and secrecy of vector map data, the classified cartography and use of maps are mainly realized by hiding technology, that is, the map is divided into military class, government class, civil class and so on. In order to protect the sensitive information in the map, but the cost of this technology is high and the efficiency is very low. In view of the security and confidentiality of vector map data and the shortcomings of the current technology, the map transformation technology emerges as the times require. Map transformation refers to the irreversible transformation of sensitive data in a map on the basis of ensuring that the topological structure of the map remains unchanged. In this paper, the local nonlinear transformation technology of vector map combines map projection technology and parallel projection technology to transform the sensitive data in the region. The region without sensitive information is not processed to ensure the security of the sensitive data in the vector map. The experimental results show that the local nonlinear transformation technology can effectively guarantee the security and confidentiality of the vector map on the basis of ensuring the invariance of the topological structure of the vector map, the map availability and the irreversibility of the transformation. The high precision and large scale map data can be used for commercial and civil use, and it has high practical value.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208;TP309

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