Suspicious 5 minute walk shed around a train station

[stevevance]

This is the API called I used: https://matrix.mapzen.com/isochrone?api_key=XXX&json=%7B%22locations%22%3A%5B%7B%22lat%22%3A%2241.96427%22%2C%22lon%22%3A%22-87.65759%22%7D%5D%2C%22costing%22%3A%22pedestrian%22%2C%22contours%22%3A%5B%7B%22time%22%3A5%7D%5D%2C%22polygons%22%3Atrue%2C%22generalize%22%3A1%7D

It has these parameters:

{"locations":[{"lat":"41.96427","lon":"-87.65759"}],"costing":"pedestrian","contours":[{"time":5}],"polygons":true,"generalize":1}

The walk shed looks very uneven. How could one walk from the station to Saint Mary of the Lake School to the south in 5 minutes, but not get much north of Leland Avenue in 5 minutes?

[rmglennon]

@stevevance - could you add an issue in https://github.com/valhalla/valhalla/issues to investigate this?

[stevevance]

@rmglennon done: https://github.com/valhalla/valhalla/issues/1053