A park's catchment area is usually constructed as if reaching its boundary were sufficient to describe access. In Helsinki, Zhao and colleagues model residential walking routes to green spaces and attach high-resolution environmental characteristics to the journey itself. Their finding that approximately 40 per cent of residents encounter low-quality environmental conditions en route changes the object of accessibility: the distance to a destination is necessary but cannot register exposure along the path. Noise is a principal concern in this case. Yet a calculated nearest route is not evidence that any particular resident used it, and modelled environmental conditions are not identical to felt comfort. The paper therefore offers an independent layer of spatial evidence, not a replacement for lived trajectories. Its methodological intervention is to turn the connective tissue between origin and destination into an auditable part of the access metric. GIS, urban ecology and public-health planning become comparable at the level of route conditions, while actual route choice remains an open empirical question.
URBANISM MEETS ART