geographical basic map 又称基础底图或地理基础底图。是用于编绘专题地图的基础底图。它是专题内容在地图上定向定位的地理骨架。
在基于GIS技术的应用系统中，都有海量的地理底图数据。
The systems which are based on GIS technology have a lot of map data generally.
本文论述了县级国土规划地图的选题、比例尺、编绘统一地理底图、编图资料、图型设计与地图整饰等问题。
This essay deals with selection of the theme and the scale of the design on country compilation of the unified base chart on geography the source map, the map shape design and the map decoration ect.
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