Home / Standards / GB/T 21740-2025 GB/T 21740-2025 Active Specifications for urban database construction of fundamental geographic information 基础地理信息城市数据库建设规范 Standard Type GBT ICS 07.040 CCS A75 Status 现行 Issue Date 2025-05-30 Implementation 2025-09-01 Responsible Dept 自然资源部(测绘地理) Drafting Unit N/A