Watermarking Scheme of Vector Maps Based on Spatial Relationship
Ming-Zhu LAI
1,2,a
, Guo-Yin ZHANG
1,b,*
1
Harbin Engineering Univ. , Harbin, 150001, China
2
Harbin University of Science and Technology, Harbin, 150082, China
a
laimingzhu@hrbeu.edu.cn,
b
zhangguoyin@hrbeu.edu.cn
Keywords: Information hiding, Digital watermarking, Spatial data.
Abstract. In order to solve problems exist in spatial data watermarking technique with rapid
expansion, this study aims to develop a watermarking system of vector maps that is based on spatial
relationship. It hides the information into spatial topological relation and areas. This system also
integrates different types of attacking algorithm and visual analyzing system for map data. The
experimental test gives consideration to both theory and practice as well as innovation and function;
meanwhile, it takes an important step in area of spatial data security and further industrialization.
Introduction
According to investigation, there are very few of spatial data watermarking system which use
watermarking algorithm base on spatial relationship and be independent from commercial GIS.
Generally, they only realize operation of encryption and decryption to geographical data file, but the
procedure is quite complicated. This study aims to develop a geographic data tool using watermarking
algorithm base on spatial relationship. It can be run directly in Windows; it can also realize adding and
detecting spatial data watermark as well as collecting major attack types so as to provide final
evaluation about algorithm performance. After improvement, this system can be a general transaction
platform of spatial data about protection, detection and identification to digital copyright. The system
is fully functional and easily used; meanwhile, it is strongly expanded. It has great value and market
potential.
This system is designed as three main modules: carrier-file loading module, watermark algorithm
module and visual attacking simulation module. The second module also can be divided into
embedding and extracting. System composition is shown in Fig. 1:
Watermarking Embedded System of
Vector Maps Based on Spatial
Relationship
Carrier-file
loading module
Watermark
algorithm
module
Visual attacking
simulation
module
Watermark
embedding
module
Watermark
extracting
module
Fig. 1 System Module of Watermarking Scheme
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