Home / Standards / GB/T 21381-2008 GB/T 21381-2008 Active Coding rules for entity identification code of traffic management geographical information - City road 交通管理地理信息实体标识编码规则 城市道路 Standard Type GBT ICS 03.220.20 CCS R07 Status 现行 Issue Date 2008-02-13 Implementation 2008-08-01 Responsible Dept 国家标准委 Drafting Unit N/A