Research on Methods and Applications of Copyright Protection for Tile Data

  • 1. Key Laboratory of Virtual Geographical Environment, Ministry of Education, Nanjing Normal University, Nanjing 210046, China;
    2. Xi'an Division of Surveying and Mapping, Xi'an 710054, China

Received date: 2012-11-01

  Revised date: 2012-11-28

  Online published: 2012-12-25


With the construction and development of the sites such as the national "MapWorld" recently attracted a growing interest from the scientific and industrial communities, and mainly due to the large number of possible applications capable to provide map service, a crucial issue is arising when dealing with tile map web service publication in copyright protection. According to the need of having a confident and secure communication of tile map in the network environment, a novel mapping mechanism based on watermarking algorithm for tile map is presented here, in such a way that the invisible and robust watermark could be embedded effectively. In the network environment, the geographic data is usually stored in the form of tiles at service terminals, while indexing mechanism is often used as the storage method in order to save the huge amount of tile map. However, the tile map stored by indexing mechanism has different watermarking technology requirements with the common image and raster map data. So, the characteristics and requirements of watermarking technology of tile map stored by the indexing mechanism are firstly analyzed in this paper, which help to apply the watermark embedding and detecting. Then, the meaningless watermark information is generated by m sequence in the process of watermark generating. On this basis, the watermark algorithm based on mapping mechanism for tile map is presented. The watermark information is embedded into the blue channel using the mapping function generated by the red and green channels. The process of watermark detecting is the inverse process of watermark embedding. Finally, the real-time copyright protection system for tile map is implemented and verified experimentally. By experiments, it has been confirmed that the proposed watermark algorithm is robust to cutting, splicing, and additive noise. Besides, the embedding has little effect on the size of original tile map.

Cite this article

LIN Na, SHU Chang-Jing, LIN Shu-Jing . Research on Methods and Applications of Copyright Protection for Tile Data[J]. Journal of Geo-information Science, 2012 , 14(6) : 693 -697 . DOI: 10.3724/SP.J.1047.2012.00693


[1] 李志刚,蒋捷,翟永,等. 面向分布式服务聚合的"天地图"总体技术架构[J]. 测绘地理信息,2012,37(5):13-15.

[2] 李京伟. 关于"天地图"合作建设与商业运营模式的思考[J]. 地理信息世界,2011,8(4):33-34.

[3] 朱长青,杨成松,任娜. 论数字水印技术在地理空间数据安全中的应用[J].测绘通报,2010(10):1-3.

[4] Li S S, Zhou W, Li A B. Image watermark similarity calculation of GIS vector data original research article[J]. Procedia Engineering, 2012(29):1331-1337.

[5] Eggers J J, Girod B. Quantization effects on digital watermarks[J]. Signal Processing,2001,81(2):239-263.

[6] Chang C C, Lin P Y. Adaptive watermark mechanism for rightful ownership protection[J]. Journal of Systems and Software, 2008,81(7):1118-1129.

[7] Kbaier I, Belhadj Z. A novel content preserving watermarking scheme for multipectral images[J]. Information and Communication Technologies, 2006, 16(2):243-247.

[8] Kim J Y, Won S M, et al. Copyright protection of vector map using digital watermarking in the spatial domain [C]. //2011 7th International Conference on Digital Content[J]. Multimedia Technology and Its Applications (IDCTA), 2011,154-159.

[9] 任娜,朱长青,王志伟. 基于映射机制的遥感影像盲水印算法[J]. 测绘学报,2011,40(5): 623-627.

[10] 殷福忠,孙立民﹒基于瓦片金字塔技术的地图发布平台开发研究[J]﹒测绘与空间地理信息,2010,33(5):16-17.

[11] 王勋,朱夏君,鲍虎军. 一种互补的数字栅格地图水印算法[J].浙江大学学报(工学版),2006,40(6):1056-1059.

[12] 符浩军,朱长青. 基于小波变换的数字栅格地图复合式水印算法[J].测绘学报,2011, 40(3):397-400.

[13] 朱长青,符浩军,杨成松,等. 基于整数小波变换的数字栅格地图数字水印算法[J]. 武汉大学学报(信息科学版),2009,34(5),619-621.

[14] 胡云,伍宏涛,张涵钰,等.大容量索引图像水印方案的设计与实现[J]. 北京邮电大学学报,2005,28(1):26-29.

[15] 王丽娜,董晓梅,梅哲,等. 图像及声音的数字水印嵌入研究与实现[J]. 东北大学学报,2002,23(3):217-220.