GB21139-2007
Basic requirements for standard data of fundamental geographic information
基础地理信息标准数据基本规定
GB 21139-2007 is a current mandatory Chinese national standard for Basic requirements for standard data of fundamental geographic information. It appears in the Machinery compliance cluster with a product safety focus and has an implementation date of Mar 1, 2008.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard is applicable to the production, certification, and utilization of standard data for fundamental geographic information in China. It covers spatial positioning frameworks and spatial analysis bases, including natural and social elements like water systems, transportation, and boundaries. This standard is mandatory for all entities involved in fundamental geographic data processing. It references standards such as GB/T 13989 and GB/T 20257.1.
Technical requirements
The standard specifies the mathematical foundation requirements, including coordinate systems, elevation benchmarks, and map projection methods. It mandates the use of specific national coordinate systems and defines the required scale series ranging from 1:500 to 1:1,000,000. Producers must adhere to the prescribed projection and sheet numbering rules. Regarding data content, the standard outlines requirements for various geographic elements. This includes survey control points, water systems, settlements, transportation networks, pipelines, and administrative boundaries. It also covers topography, vegetation, place names, digital orthophoto maps, and cadastral survey data. The standard sets strict requirements for the production process. It mandates comprehensive project design documents, proper data sources, and rigorous quality control procedures, including process checks and final inspections. All production must follow approved technical routes and utilize calibrated equipment. Finally, it establishes the data certification requirements. Data must be certified by authorized institutions based on the data's scale and classification. Producers must provide surveying qualification certificates, design documents, and signatures from registered surveyors. Certification is mandatory before data can be officially recognized.
Testing methods
The standard outlines evaluation procedures focusing on quality control during the production process. This includes verifying the compliance of project design documents, checking the accuracy of data sources against national standards, and conducting process inspections and final acceptance reviews. Additionally, it requires the verification of measuring instruments calibration and the validation of data certification documents by authorized agencies.
FAQs
What products are regulated under GB 21139-2007?
It regulates fundamental geographic information data, including digital elevation models, orthophotos, and vector data of natural and social elements used as a spatial positioning framework.
Is GB 21139-2007 a mandatory standard?
Yes, all technical content in this standard is mandatory for the production, certification, and use of fundamental geographic information standard data in China.
Who is responsible for data certification according to this standard?
Certification is handled by authorized institutions. High-level control point data and small-scale data (1:25,000 to 1:1,000,000) are certified by agencies authorized by the national surveying department, while larger scale data is certified by provincial-level agencies.
The summary above provides a high-level overview of GB 21139-2007. To ensure complete compliance for your geographic information products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21139-2007 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Management
- CCS
- A75
- ICS
- 07.040
- Competent department
- Ministry of Natural Resources (Surveying, Mapping and Geography)
- Technical committee
- National Technical Committee on Geographic Information of Standardization Administration of China