本文主要是研究海洋测绘数据库的维护问题与其改进技术。
This paper is to study the problem of Marine surveying and mapping database maintenance and improved technology.
但测绘部门建立的地形图数据库多为单纯的制图数据，虽然与GIS数据一样是矢量结构，却无法直接输入GIS以满足应用需要。
But most of topographical map database produced by survey department is only cartographic data, which is vector data structure, but cannot be imported into GIS directly to meet GIS using.
为了实现测绘成果资料的科学化管理，建立了西山矿区地形图管理系统，以2 GB的数字化地形图创立了一个西山煤电集团公司规范的数据库。
This paper states the geographical map management system of Xishan coal mining area. Xishan coal electricity group company builds the company standard data-base for 2GB digital geographical map.
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