WFS API

From the dataset abstract

Accessibility in terms of travel time to train and metro stations in the Helsinki metropolitan area by walking and cycling along light traffic routes. Accessibility zones have been calculated for time spans of 5, 10 and 15 minutes.

Calculation started from the entrance points of the stations/platform areas. Walking speed was defined as 5.2 km/h and cycling speed as 14 km/h.

The materials can be viewed and downloaded in HSY’s open map service.

Source: Kävely- ja pyöräilyaikavyöhykkeet pääkaupunkiseudun asemille