city

Definition

Signals that the setting is an urban environment rather than an indoor one. For embodied agents this changes the problem substantially: street networks, long-range navigation, many independently moving objects, and landmarks visible far beyond the immediate room. The difficulty is not only spatial extent — in an open city, specifying a goal and scoring whether the agent reached it are themselves harder than in a bounded floor plan.

Explainers using this term

• Paper Walkthrough — UrbanGround: Where MLLM Agents Break Down on a Real StreetUrbanGround: From Local Perception to Spatial Agency in a Real-Scale City