GraphHopper Blog

Turn Restriction Support for GraphHopper’s Directions API

Today we are proud to announce another big improvement of GraphHopper’s Directions API: We’ve added turn restriction support to our routing solutions! Turn costs and turn restrictions, defined The time it takes to go from one place to another depends on how far we need to go (distance), and how fast we travel that distance […]

Examples For Customizable Routing

In this blog post we’ll describe how custom profiles can be used and include real world examples. Update: this post was updated in May 2021 using the open source routing engine version 3.0 that contains major improvements to the format. Since October 2021 this format is also available in the GraphHopper Directions API. Disclaimer: custom […]

GraphHopper Routing Engine 1.0 Released

Today, after more than 8 years of work, we are releasing version 1.0 of the open source GraphHopper routing engine. GraphHopper calculates optimal routes in road networks (for example taken from OpenStreetMap) for many different vehicle types and finds the ideal itinerary when using public transit. It is released under the Apache License 2.0 and […]

Get Started With Customizable Routing

The upcoming version 1.0 of the GraphHopper routing engine has a new customizable routing feature. Disclaimer: custom profiles are an alpha feature in version 1.0 and 2.0. Using them will work, but the format has significantly changed in 3.0. Also this feature will strongly benefit from your feedback, so do not hesitate with sharing your […]

Experiments with GraalVM native images (2/2)

The previous blog post was about the “normal way” of using GraalVM native images. In this blog post I use it to run Java code on Android without the usual limitations of “Android Java”. I.e. the Java code can be JDK 11 and include arbitrary libraries which is usually not possible when using Dalvik or […]

Experiments with GraalVM native images (1/2)

This blog post is about the experience I made when compiling the GraphHopper routing engine to a native executable using GraalVM. The GraphHopper routing engine is an open source project that uses the road network from OpenStreetMap and is able to calculate routes from A to B very fast and offers other features like isochrone […]