A new zero-watermark copyright protection algorithm for 2d vector maps is proposed.
提出了一种新的二维矢量数字地图的零水印算法。
A difference histogram-based reversible data hiding algorithm was proposed for authentication and covert communications of vector maps.
提出一种基于差值直方图的可逆数据隐藏算法，用于矢量地图的认证和隐秘通信。
All of these two modules achieve unified management and scheduling about remote sensing images, vector maps, digital elevation models and three-dimensional scene data.
这两个模块的结合，实现了遥感影像、矢量地图、数字高程模型以及三维场景数据的统一管理和调度。
To get appropriate electronic vector maps are often expensive and difficult during the development of a small and low cost GIS.
在低成本地理信息系统开发过程中，合适的电子矢量化地图的获得往往不太容易或费用高。
To get appropriate electronic vector maps are often expensive and difficult during the development of a small and low cost GIS.
在低成本地理信息系统开发过程中，合适的电子矢量化地图的获得往往不太容易或费用高。
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