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Development and Task of China Digital Geospatial Framework

RUAN Yu-zhou(Development&Research Centre of State Bureau of Surveying and Mapping,Beijing,100048,China)  
China Digital Geospatial Framework(CDGF) is the base of Digital China,and building CDGF is the most important task of surveying and mapping department.The author of the paper summarized the main progress,problems,opportunities and challenges of CDGF,and put forward basic thoughts,main tasks and methods to improve CDGF.
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