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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21740-2025: Specifications for urban database construction of fundamental geographic information Status: Valid GB/T 21740: Historical versions
Basic dataStandard ID: GB/T 21740-2025 (GB/T21740-2025)Description (Translated English): Specifications for urban database construction of fundamental geographic information Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: A75 Classification of International Standard: 07.040 Word Count Estimation: 26,243 Date of Issue: 2025-05-30 Date of Implementation: 2025-09-01 Older Standard (superseded by this standard): GB/T 21740-2008 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 21740-2025: Specifications for urban database construction of fundamental geographic information---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 07.040 CCSA75 National Standard of the People's Republic of China Replace GB/T 21740-2008 Specifications for the construction of basic geographic information city database Released on 2025-05-30 2025-09-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General 1 4.1 Construction Principles 1 4.2 Spatial Reference System 2 4.3 Time reference 2 4.4 Data Format 2 4.5 Security and Confidentiality 2 5 Data content and quality requirements 2 5.1 Data Content 2 5.2 Data Quality Requirements 4 6 Construction Process 4 7 Database Design 5 7.1 Overview 5 7.2 Demand Investigation and Analysis 6 7.3 Conceptual Design 6 7.4 Functional Design 6 7.5 Logic Design 7 7.6 Physical Design 7 7.7 Security and Confidentiality Design 7 7.8 Design requirements 8 8 Data Database Construction 8 8.1 Data Preparation 8 8.2 Checking data before storage 8 8.3 Data Processing 8 8.4 Database creation 8 8.5 Data storage 9 8.6 Checking the data after it is stored in the database 9 9 Development and Integration 9 9.1 Management System Development and Integration 9 9.2 Data Integration 9 9.3 Software and Hardware Integration 9 10 Testing and Acceptance 10 10.1 Database Testing 10 10.2 Database Acceptance 10 10.3 Data Archiving11 11 Operation and Maintenance11 11.1 Basic requirements 11 11.2 Data maintenance and update 11 11.3 Software and Hardware Maintenance and Upgrade 12 Appendix A (Normative) Data Organization Requirements 13 A.1 Basic control data 13 A.2 Digital Line Graph Data 13 A.3 Digital orthophoto data 13 A.4 Digital elevation model data 13 A.5 Digital surface model data 13 A.6 Place names and address data 14 A.7 3D Geographic Information Model Data 14 A.8 Geographic entity data 15 A.9 Grid Data 15 A.10 Street View Data15 A.11 Metadata 15 Appendix B (Informative) Data Integration Method Example 16 B.1 Example of digital line drawing data integration method 16 B.2 Example of integration of place name and address data with digital orthophoto data16 B.3 Metadata Integration Example 17 Reference 18ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 21740-2008 "Specifications for the Construction of Basic Geographic Information Urban Database" and is consistent with GB/T 21740-2008. In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) "Scalability" was added to "Construction Principles" (see Chapter 4); b) Changed the relevant provisions of "Data Content". "Digital Surface Model Data" and "Place Name and Address Data" were added to "Basic Data" "3D geographic information model data", "geographic entity data", etc.; "grid data" and "street view data" have been added to "extended data" etc., changed the content provisions of "metadata" and "other data", deleted the "element data dictionary" (see 5.1, 4.4,.2008 edition Chapter 5); c) In “Data Quality Requirements”, the following sections are deleted. “Database Data Quality Fidelity Requirements”, “Database Data Quality Fidelity Measures”, and “Data Quality "Quality control of image and grid data", "quality of representation" and "quality of attachments" were added. Related content (see 5.2, 4.6 and Appendix A of the.2008 edition); d) The database construction process has been changed (see Chapter 6, 4.9 of the.2008 edition); e) The content of "Data Organization" in "Logical Design" is made into a separate normative appendix A, and the content of "Organization of Digital Grid Map Data" is deleted. "Organization and association of other data", and added "digital surface model data", "place name and address data", "three-dimensional The data organization requirements for geographic information model data, geographic entity data, grid data, and street view data have been modified. Data organization requirements for “mapping data” and “digital elevation model data” (see 7.5.2, Appendix A, 6.5 of the.2008 edition); f) Added "Timing Management" to "Logic Design" (see 7.5.3, 6.5 of the.2008 edition); g) Changed the requirements of "Physical Design", "Safety and Confidentiality Design", "Design Document Requirements" and so on (see 7.6, 7.7, 7.8,.2008 Edition) 6.6, 6.7, 6.8); h) Changed the content related to "data pre-entry inspection" and added the relevant provisions of "database body creation" (see 8.2, 8.5,.2008 Chapter 7 of the.2001 edition); i) “Development and Integration” adds the requirement of “management system development and integration” and changes the relevant contents such as “software and hardware integration” (see Section 9 Chapter 8 of the.2008 edition); j) Modified the relevant contents and requirements of "Database Testing" and "Database Acceptance" in "Testing and Acceptance" (see Chapter 10,.2008 Chapter 9 of the.2002 edition); k) Changed the requirements related to “Operation and Maintenance” (see Chapter 11, Chapter 10 of the.2008 edition); l) “Technology and Quality Management” has been deleted (see Chapter 11 of the.2008 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed by the Ministry of Natural Resources of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee for Geographic Information Standardization (SAC/TC230). This document was drafted by. Surveying and Mapping Standardization Institute of the Ministry of Natural Resources, the Second Topographic Survey Team of the Ministry of Natural Resources, and the Construction Comprehensive Survey and Research Institute. Design Institute Co., Ltd., Interstellar Space (Tianjin) Technology Development Co., Ltd., Beijing Surveying and Mapping Design Institute, Shanghai Surveying and Mapping Institute, Xi'an Surveying and Mapping Institute Institute of Surveying and Mapping, Chongqing Geographic Information and Remote Sensing Application Center, Ningbo Institute of Surveying, Mapping and Remote Sensing Technology, Guangzhou Urban Planning, Surveying and Design Research Institute, Shenzhen Planning and Natural Resources Data Management Center (Shenzhen Spatial Geographic Information Center), Shaanxi Basic Geographic Information Center of the Ministry of Natural Resources Information Center, China Southern Power Grid Digital Grid Technology (Guangdong) Co., Ltd., Guangzhou Changdi Space Information Technology Co., Ltd., State Grid Siji Location Service Co., Ltd., Wuhan Municipal Land Resources and Planning Information Center, Shenzhen Geological Construction Engineering Company, Liaocheng University, NARI Technology Co., Ltd. Company, HuaDa Tianyuan (Beijing) Technology Co., Ltd. The main drafters of this document are. Chen Jun, Zhang Kun, Xiao Xuenian, Wang Dan, Jiang Yifang, Lü Yuxia, Jia Guangjun, Zhao Feng, Zhang Chunkui, Wu Guoliang, Zheng Xiaomei, Li Changhui, Peng Zifeng, Wang Naisheng, Xia Wei, Zhou Junzhao, Wang Li, Liu Mingxing, Yu Chuanjie, Zhao Jianwei, Zhang Xinli, Rong Yanxiang, Pang Hui, Shao Shiwei, Jin Yabing, Cai Wenyang, Xie Xiuping, Zhang Yongqiao, Yin Tong, Wenhua. The previous versions of this document and the documents it replaces are as follows. ---First published in.2008 as GB/T 21740-2008; ---This is the first revision. Specifications for the construction of basic geographic information city database1 ScopeThis document specifies the general principles, data content and quality requirements, data organization, construction process and And technical requirements for database design, construction, development and integration, testing and acceptance, operation and maintenance. This document is applicable to the construction of urban basic geographic information database.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 9361 Computer Site Safety Requirements GB/T 13923 Classification and codes of basic geographic information elements GB 17859 Criteria for the classification of computer information system security protection levels GB/T 18521 Rules for the classification and classification of geographical names GB/T 20258.1 Basic geographic information element data dictionary Part 1.1.5001.10001.2000 scale GB/T 20258.2 Basic geographic information element data dictionary Part 2.1.50001.10000 scale GB/T 20258.3 Basic geographic information element data dictionary Part 3.1.250001.500001.100000 scale GB/T 33453-2016 Specification for the construction of basic geographic information database GB/T 39608 Metadata of basic geographic information digital products GB 50174 Data Center Design Specification CH/T 9017 Three-dimensional geographic information model database specification3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 geo-entity A geographical object in the real world that occupies a certain spatial position and range and has the same attributes or complete functions independently. 3.2 Semantics data of geo-entity Information that consistently describes the attributes of geographic entities (3.1) and the relationships between them.4 General4.1 Construction Principles The construction of basic geographic information city database follows the following principles. a) Applicability. It should be able to meet users' needs for basic urban geographic information in terms of data content, technical indicators, database structure, and service methods. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21740-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 21740-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 21740-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 21740-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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