As a starting point for my sociography of the Shanghai Rotary Club over the period 1930-1948, I propose three different visualizations (graphs or charts, tree maps, GIS maps) in order to cross-analyze the four data elements I extracted from the available documentation - members’ nationality, sector of activity, occupations, and office and residential address in Shanghai. 

NB The figures I used in this data sketching exercice are purely arbitrary and do not refer to  historically actual data.