Home / Standards / GB/T 13989-1992 GB/T 13989-1992 Abolished Subdivision and numbering for the national primary scale topographic maps 国家基本比例尺地形图分幅和编号 Standard Type GBT ICS 07.040 CCS A79 Status 废止 Issue Date 1992-12-17 Implementation 1993-07-01 Responsible Dept 自然资源部（测绘地理） Drafting Unit N/A