Imagine you are in a foreign city and need to visit fifty different locations that day. Which way should you go? Or let alone which is the best order to visit all these places? GraphHopper’s Route Optimization API is a powerful tool that lets you easily calculate efficient round tours like this for a selection […]

Introduction A few years ago, we wrote a tutorial to show you how to model a traveling salesman problem with a week-planning horizon. Since then we have been improving our API a lot and I would like to show you how easy it is now to model this with driver shifts. For example, suppose you […]

With the GraphHopper Directions API it is easy to calculate the route from A to B including multiple intermediate waypoints. Our customers often use the Route Optimization API to get an optimized order of many deliveries. To deliver your packages or services in real world you additionally need a navigation application where you need turn […]

We are happy to announce further improvements of our services. Please note that we will remove the possibility to use TLS 1.0 and 1.1 in approx. 6 weeks. On 1. September these older protocols won’t be possible anymore. Nearly all clients should use more recent versions already, so highly likely no action must be taken […]

We are happy to announce our new API docs. We specified our APIs in the OpenAPI specification language and moved the entire content of our old documentation to a single OpenApi 3.0 document. This has many advantages: There is only a single source for the documentation of new features, and for generating client code to […]

At GraphHopper we regularly receive requests on how to build a navigation app with the GraphHopper Directions API. At the moment our customers either have no turn-by-turn navigation or rely on third party apps like Google Maps or devices from TomTom. The biggest disadvantage in this case is the mismatch of estimated time of arrival […]