基于席尔宾斯基垫片的GIS矢量数据置乱方法  

Scrambling transformation of GIS line/polygon layer vector data based on Sierpinski Gasket

作　　者：吴雪荣[1] 李安波[1] 吴赛松[1] 蒋伟[1] 周卫[1] 

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,南京210023

出　　处：《测绘科学》2015年第9期102-106,124,共6页Science of Surveying and Mapping

基　　金：国家社科基金重大项目(11&ZD162);国家自然科学基金项目(41371374)

摘　　要：为提高GIS矢量数据在数据传输过程中的隐蔽性,该文结合分形模型席尔宾斯基垫片变换技术,通过对要素点集合中每个点的位置进行置乱处理,实现了一种针对GIS线面图层数据的置乱方法,并基于置乱度的置乱效果评价方法,明确了置乱效果与分形维数之间的正相关关系。实验表明:该方法保持了有效的数据格式和整体形态的相似性,具有较好的隐蔽性和迷惑性;在满足处理效率和隐蔽性应用需求的前提下,可有效保障矢量地理数据在数据传输、数据托管服务、封装存储中的安全性。In order to improve the invisibility of the GIS vector data during transmission, this paper realized a scrambling transformation of GIS line/polygon layer vector data based on Sierpinski Gasket technology, by the scrambling process in the position of each point in the point set. It defined the positive correlation between the scrambling effect and the fractal dimension based on the degree of scramb ling. Experimental result showed that the method would keep the effective data format and the overall shape similarity with good invisibility and confusing, which could effectively protect the security of vector geographic data in the data transmission, data hosting services and packing storage under the premise of processing efficiency and hidden application requirement.

关 键 词：矢量地理数据 席尔宾斯基垫片 数据置乱 置乱度 

分 类 号：P208[天文地球—地图制图学与地理信息工程]