Home / Standards / GB/T 41447-2022 GB/T 41447-2022 Active Technical specification for three-dimensional modeling of urban underground space 城市地下空间三维建模技术规范 Standard Type GBT ICS 07.040 CCS A75 Status 现行 Issue Date 2022-04-15 Implementation 2022-04-15 Responsible Dept 自然资源部(测绘地理) Drafting Unit N/A