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Thoughts on the Improvement and Upgrade of National Geodetic Datum

Cherr Junyong(State Bureau of Surveying and Mapping, Beijing, 100830)  
Geodetic datum is the fundamental frame of geographical information system, surveying and mapping. The establishment, maintain, improvement and upgrade of National Geodetic Datum is one of the main tasks of State Bureau of Surveying and Mapping. It is not only due to the out-of-date of geodetic infrastructure, but also the needs of the development and progress of national economy and society. National Gravimetry Datum has to be reestablished, and National Geodetic Coordinate System has to be improved and updated, i. e. to establish a unified national geocentric 3-dimentional coordinate system and to improve the accuracy of the coordinates of astro-geodetic network.
【CateGory Index】: P228
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Chinese Journal Full-text Database 8 Hits
1 GU Dan sheng,ZHANG Li, CHENG Peng fei,WANG Quan,LI Xi yin,CHENG Ying yan,BI Jin zhong;Objectives of the Geodetic Datum in China[J];Bulletin of Surveying and Mapping;2003-03
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