With the rapid growth in application and requirement for sharing geographical data,the problem of geographical data security arises prominently.The security of geographical data not only affects the healthy development of the geographical information industry,but also has connections construction of national defense and national security.Digital watermarking and encryption control techniques have become frontier techniques and effective solutions for achieving protection of geographical data.Recently,the research and application of digital watermarking techniques have experienced fast development.In this study,the research background and requirements of digital watermarking and encryption control is introduced.In addition,this paper analyzes and evaluates their theories,models and research progresses and discusses the related software development and application status.Finally,the future routes of theoretical research and applications of digital watermarking are prospected based on the developing trend of geographic information industry and information techniques.%随着地理数据应用和共享需求的迅速增长,地理数据安全问题日益凸显.地理数据安全问题不仅影响着地理信息产业的健康发展,更关系着国家安全和国防建设.数字水印与加密控制技术是地理数据安全保护的前沿技术和有效手段,近年来相关技术研究和应用也得到了深入发展.本文针对地理数据数字水印技术和加密控制技术,介绍了其研究背景和需求,综述和评价了其理论、模型及算法的研究进展,论述了其在实际中的软件研发和应用现状,并根据地理信息产业和信息技术的发展趋势,展望了其理论研究和应用开发的未来发展方向.
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