Abstract: By studying the MAPGIS-based management system of the 1/500000 digital geologic map database of the People's Republic of China,we focus the study on the search codes of geological and geographic factors and establish the coding rules for retrieval. The database'search code is composed of geologic factor and geographic content. The geologic factor search code includes: chronostratigraphy,geologic borderline and fault,genesis type,metamorphic rock,intrusive rock,volcanic rock,well core,isotope and crater age,logic hierarchy and so on. Geographic content search code includes eight parts,namely,the inhabited area,river,lake,border,communication,culture,ocean,and the others. In this paper,we also give the fields for data of each type and for retrieving. For the convenience of MapInfor users,the authors convert the data format of the database management system into MapInfor format,and adopt Visual Basic 6.0 to transform the MAPGIS-based database management system of the 1/500000 digital geological map of the People's Republic of China into MapInfor platform. The software include: [FILE],[SPACE SCOPE SEARCH],[GEOGPHIC CONTENT SEARCH],[GEOLOGIC FACTOR SEARCH],[EXIT]. At last,instructions are attached on how to use the 1/500000 digital geological map of the People's Republic of China based on MapInfor platform.

Key words: geologic content, geographic content, digital geological map, database

摘要： 在研究以MAPGIS为平台的中华人民共和国1/50万数字地质图数据库管理系统的基础上,通过对该系统数据库的年代地层、地质界线与断层、成因类型、岩石类型以及钻孔、同位素年代和火山口、地理内容检索代码的研究,得出该系统数据库按地质内容、地理内容检索的代码编码规律。为方便广大M apInfor用户的使用,笔者将该系统的数据转换成M apInfor格式的数据,采用VB6.0将该系统转换成以M apInfor为平台的中华人民共和国1/50万数字地质图数据库管理系统。同时介绍了以M apInfor为平台开发的中华人民共和国1/50万数字地质图数据库管理系统的使用。

关键词: 地质内容, 地理内容, 数字地质图, 数据库