Review of Digital Watermarking for 2D-Vector Map

Vector map is widely used in geographic information system, the military surveying and mapping, etc. The security problem such as copyright authentication, integrity verification, user tracking, and so on, is increasingly prominent in the process of distribution and use of data. Digital watermarking technique is applied in vector map data, becoming an important auxiliary means to solve these problems. Based on the characteristics of vector map and digital watermarking technology, we propose a general module for vector map copyright protection. The function module mainly includes: the vector map watermarking embedded location selection module, watermarking embedded module, copyright decision module or integrity decision module. And for each function module we summarize the vector map watermarking technology research at present, analyze the research route and the main problems, and the possible future research directions in this field and focus are discussed.