Introduction -- Part 1: Digital cities -- Hybrid smartness: Seeking a balance between top-down and bottom-up smart city approaches -- Interpreting the smart city through topic modelling -- The venue code: digital surveillance, spatial (re)organization, and infrastructural power during the COVID pandemic in China -- The platformization of public participation: Considerations for urban planners navigating new engagement tools -- Part 2: Mobility futures -- Shared micro-mobility: A panacea or a patch for our urban transport problems?- Understanding bikeability: Insight into the cycling-city relationship using massive dockless bike-sharing records in Beijing -- Disclosing the impact of micro-level environmental characteristics on dockless bikeshare trip volume: A case study of Ithaca -- A planning support system for boosting bikeability in Seoul -- Integrating big data and a travel survey to understand the gender gap in ride-hailing usage: evidence from Chengdu, China -- Urban airspace route planningfor advanced air mobility operations -- Part 3: Fine-scale urban analysis -- "Eyes on the Street": Estimating natural surveillance along Amsterdam's city streets using street-level imagery -- Automatic evaluation of street-level walkability based on computer vision techniques and urban big data: A case study of Kowloon West, Hong Kong -- Promoting sustainable travel through a web-based tourism support system -- Applying the Aurin walkability index at the metropolitan and local levels by sex and age in Australia -- Predicting urban heat island mitigation with random forest regression in Belgian cities -- A framework to probe the uncertainties in urban cellular automata modeling with multilevel density for the Wallonia region, Belgium.