@Path(value="/routers/{routerId}/analyst/tile/{z}/{x}/{y}.png")
public class TileService
extends RoutingResource
NOTE This way of fetching travel time tiles does not currently work.
It relied on an SPT cache which would find existing SPTs based on search request parameters.
Server side stored search results are now done explicitly with TimeSurfaces.
See org.opentripplanner.api.resource.SurfaceResource, functions createSurface and tileGet
The basic idea is to create a surface for a "batch" or one-to-many OTP search, then using the returned ID
fetch the tiles from a URL under that surface ID.