Space, thematic attribute and time are the three basic characteristics of geographical phenomena or the essential data types of GIS database.
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.
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。
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