This map aims at mapping the workplace (office) and place of residence of the members of the Shanghai Rotary Club between 1930 and 1948. The original data come from three successive rosters of members published in 1930, 1940 and 1948. I relied on ArcGis and QGis to process the data. 

The map shows a striking concentration of workplaces in the Central district of the International Settlement (grey dots). By contrast, places of residences (green dots) are scattered throughout the two foreign settlements, with a marked preference for the Western section of the French Concession (which roughly coincided with the "residential zone" that the French municipal council drew in 1938). Overall, there was a clear separation between workplaces in the Central District of the International Settlement and places of residence in the French Concession. No Rotarians worked or resided in the Chinese-administered districts.