GenAI Models Capture Urban Science but Oversimplify Complexity
Yecheng Zhang, Rong Zhao, Zimu Huang, Xinyu Wang, Yue Ma, Ying Long
Source document (2026)
Generative artificial intelligence (GenAI) models are increasingly used for scientific data generation, yet their alignment with em- pirical knowledge in urban science remains unclear. We therefore ask whether generated urban data reproduce empirical regularities and support repeatable experiments. We in- troduce AI4US, a framework for evaluating data synthesis and conditional intervention across text and image modalities. Four cases spanning urban systems, within-city struc- ture, neighbourhood vitality and streetscape perception are evaluated against published parameters, observed urban data and human judgements. Generated outputs recovered recognizable scaling and distance-decay pat- terns and yielded measurable associations be- tween neighbourhood morphology indicators and pedestrian activity, while model judge- ments showed positive agreement with sam- pled human choices. Controlled changes to urban conditions produced repeatable out- put responses across all four cases. How- ever, generated data often compressed empir- ical numerical coverage, local variation and visual diversity. In an inspectable GenAI model, intermediate activations linearly dis- tinguished some urban relationships, while activation edits changed only selected out- put scores. AI4US provides an empirically grounded approach for assessing GenAI as the virtual urban laboratory in urban data synthesis and controlled model experiments, while revealing its tendency to simplify em- pirical complexity.
