A Study of the 1∶250 000 Scale Topographic Maps of China:Compilation by the Army Map Service in the 1950s
The Army Map Service(AMS)was a professional military mapping agency established by the U.S.military during World War II.The 1:250 000 China topographic map is a medium-scale topographic map series compiled by the AMS in the 1950s.This set of maps primarily reflects the geographical situation of China from the end of the Comprehensive Anti-Japanese War to the period just before 1949.The accuracy of the topographic maps is contingent upon whether the U.S.military conducted actual surveys in the area and the quality of the data sources.The data sources primarily consist of American,Japanese,and Chinese maps,as well as aerial photography,making them the most accurate medium-scale topographic maps reflecting modern standards at the time.The versioning and compilation cycles of the topographic maps are tied to the operational needs of the U.S.military,with faster updating and publication speeds for maps near theaters of war.Overall,this map series represents an organic integration of numerous modern cartographic achievements and stands as the most accurate medium-scale topographic map reflecting contemporary surface features.Furthermore,the standardized processing of these maps also offers new opportunities for cross-regional historical geography research.
Army Map of Servicetopographic map of Chinamedium-scale mapmap analysis
NETL
NSTL
万方数据
