地理底图 meaning in Chinese

geographical base map

This paper is the summaries for drawing digital gravity map and surface _ color map with 1 : 200 , 000 aims to introduce the mapping special method and processes by means of computer digital technique in gis system while making regional gravity map and geographic map base with 1 : 200 , 000
本文是1 20万数字重力图及面色图的编制工作总结，文中主要介绍了在制作1 20万区域重力图和地理底图时，采用gis系统，由计算机数字制图的具体方法和步骤。