Home / Standards / GB/T 12340-2008 GB/T 12340-2008 Active Specifications for aerophotogrammetric office operation of 1:25 000 1:50 000 1:100 000 topographic maps 1:25 000 1:50 000 1:100 000地形图航空摄影测量内业规范 Standard Type GBT ICS 07.040 CCS A77 Status 现行 Issue Date 2008-06-20 Implementation 2008-12-01 Responsible Dept 自然资源部（测绘地理） Drafting Unit N/A