Geo-information work at China Geological Survey Spatial data in these databases are stored in multi-formats due to different managing software used, mainly in ArcInfo, ArcView( Coverage or Shape ), MapGIS(a Chinese domestic GIS package,Wt, WP and Wl), and MapInfo(Tab and Mif). Most of the database system are based on MS SQL server, some on MS Access based, a few on Oracle. 3.4 Systematic management and maintenance of CGS geological databases Update and maintenance of all the developed databases have been done in time each year. The database of national solid mineral deposits and its distribution, for instance, has been keyed in more than 2000 metal, nonmetal, coal etc. mineral deposits that were discovered in 2002. Aeromagnetic database has updated to cover Tibet in 2003. Regional gravity data is covering Tibet and western areas within two years. Geological map databases at the scale of less than 1:250,000 will be updated every three or four years not only new data added, but data format and managing system software. 1;500,000 Geological map database is been updating this year for data format and managing system so as to catch up with the GIS users. Software on the purpose of data utilization is also developed ever since the beginning of database development. ArcView GIS based aero-electromagnetic survey database (GEMD1.0) and geophysical logging database system(GLDB 1.0) had been developed in 2001. GIS system for geophysical, geochemical remote sensing data processing (PCR/GIS 1.0) has been put into use. Regional geochemistry database information system (GeoMDIS2003) is now running at almost all the provinces over the country. No-seismic geophysical interpretation system(GME/GIS) and gravity data coordination and processing system(RGIS 2.0) are tested and meet with users this year. Figure 1 and figure 2 shows examples of PCR/GIS 1.0 and RGIS 2.0.  Fig.1 User interface of PCR/GIS 1.0. Geochemical element data table and data analysis manus are shown.  Fig 2. Main user interface of RGIS version 2.0. Pull down manuals from left to right are File, Edit, Object Edit, Quary,Table,DataCoordination,DataProcessing,Map, View and Window in turn. A system work team for these database updating maintenance is also being development both staff and technical procedures within CGS projects. 4. Achievements in geoinformation work procedures 4.1 Standards for CGS digital informationalization The standards of CGS informationalization include fundamental standards, database standards and specifications of software system development. Database standards and specifications of software system development are technical standards and can be directly adopted in project work. Database standards are the guarantee of data exchange and sharing, which are used to determine contents of database, management modes, data formats of storage and data exchange.Technical standards are used to instruct systematic design, including data collection, system running and system maintain. To support the database development and informationization in CGS, a series of standard are issued since 1999, include data collection, storage, processing, integration, expression and management. For spatial databases, CGS adopts uniform national geographic space reference coordinates system. Planar control system adopts 1980’s national ground coordinates system; elevation control system adopts 1985’s national elevation benchmark. Some 30 standards are issued and some of them are already released and put into use since 1999, mainly for database development and digital geological map production. The following table 3 shows these standards in brief. 
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