GB/T 21740-2025Specifications for urban database construction of fundamental geographic information (English PDF)

Foreword

This 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 database

1 Scope

This 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 references

GB/T 9361

GB/T 13923

GB 17859

GB/T 18521

GB/T 20258.1

GB/T 20258.2

GB/T 20258.3

GB/T 33453-2016

GB/T 39608

GB 50174

3 Terms and definitions

The following terms and definitions apply to this document.

4 General