..._百度空间 ... geographic entity地理实体 geographic feature data地理特征数据 geographic feature 地理特征 ...
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简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
尺度是地理现象、地理数据所共有的重要特征之一。
Scale is one of the common characters of geographic phenomenon and data.
空间、属性、时间是地理现象的三个基本特征或地理信息系统数据库的三种基本数据成分。
Space, thematic attribute and time are the three basic characteristics of geographical phenomena or the essential data types of GIS database.
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