Issuing organization: General Administration of Quality Supervision, Inspection and Quarantine / National Standardization Administration
Release time: 2008
Specification category: mandatory standards
Whether to abolish: No
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This standard is proposed by the National Bureau of Surveying and Mapping.
This standard is under the jurisdiction of the National Geographic Information Standardization Technical Committee.
Appendix A and Appendix B of this standard are normative appendices.
This standard was drafted: National Institute of Surveying and Mapping Standardization of National Bureau of Surveying and Mapping, National Basic Geographic Information Center, the First Geodetic Survey Team of National Bureau of Surveying and Mapping, China Academy of Surveying and Mapping.
The main drafters of this standard: Xiao Xuenian, Zhang Lei, Yue Jianli, Zhang Yanping, Zhang Chuanyin.
GB 22021-2008 Introduction In order to meet the needs of national economic construction, national defense construction and social development, strengthen China's geodetic survey, regulate geodetic survey behavior, and develop this standard in accordance with the "People's Republic of China Surveying and Mapping Law". The geodetic survey referred to in this standard refers to the surveying and mapping activities that determine the position, shape of the earth, gravity field, and its change with time and space, in order to establish and maintain a surveying and mapping datum and mapping system.
Its task is to establish and maintain the geodetic datum, elevation datum, depth datum, and gravity datum; determine and refine the geoid-like surface and the earth's gravity field model. This standard specifies the basic technical requirements for geodetic surveys in China, and is the main basis for formulating and revising specific technical standards for geodetic surveys.
For the specific technical methods and technical requirements for establishing and maintaining China's geodetic control network, elevation control network, and gravity control network, corresponding technical standards will be separately formulated to guide and standardize the survey work. Ⅱ National Geodetic Basic Technical Regulations GB 220 21-2001 Scope This standard specifies the establishment and maintenance of a geodetic control network, an elevation control network, and a gravity control network, and determines the basic technical indicators and technical requirements of a similar geoid. Uniform geodetic and elevation datums, and corresponding depth and gravity datums. This standard applies to geodetic surveying activities in the territory of the People's Republic of China and other sea areas under its jurisdiction.