Integrated Multimedia City Data (iMCD): A composite survey and sensing approach to understanding urban living and mobility

•The Integrated Multimedia City Data (iMCD) is a data platform involving detailed survey, and Internet data.•The platform allows research into urban living and knowledge discovery regarding smart, future and learning cities.•One example analyzes the relationship between travel distance and measured financial literacy and numeracy.•Another example uses social media data to understand spatio-temporal aspects of urban activity patterns.•Deep learning applications of personal image data yields an isolation index that can be linked to socio-demographics.