Overview

digitransit is a slightly complex system composed of multiple services in container that talk to each other. A nice architecture image can be found at the digitransit.fi documentation.

The main components of an digitransit deployment consists of:

• Multimodal routing engine (OpenTripPlanner)

• Address search (originally pelias)

• Background map service (hsl-map-server: [tessera], [tilelive])

• Web browser-based user interface (digitransit-ui)

A nicer description of the components and their job exists also at https://digitransit.fi/en/services/

Note

As can be seen in the diagram, some dependencies are circular. This poses a few challenges when first setting up a working instance, which we will address later on.