Home / Standards / GB/T 45668-2025 GB/T 45668-2025 Active Technical requirements for underground space information system construction 地下空间信息系统建设技术要求 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