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Valhalla is an open source routing engine and accompanying libraries for use with OpenStreetMap data. Valhalla also includes tools like time+distance matrix computation, isochrones, elevation sampling, map matching and tour optimization (Travelling Salesman).

Build Status

Linux	Code Coverage

License

Valhalla, and all of the projects under the Valhalla organization, use the MIT License.

Overview

There are several key features that we hope can differentiate the Valhalla project from other routing and network analysis engines. They are:

• Open source software, on open source data with a very liberal license. Should allow for transparency in development, encourage contribution and community input, and foster use in other projects.
• Tiled hierarchical data structure. Should allow users to have a small memory footprint on memory constrained devices, enable offline routing, provide a means for regional extracts and partial updates.
• Dynamic, runtime costing of edges and vertices within the graph via a plugin architecture. Should allow for customization and alternate route generation.
• C++ based API. Should allow for cross compilation of the various pieces to enable routing on offline portable devices.
• A plugin based narrative and manoeuvre generation architecture. Should allow for generation that is customized either to the administrative area or to the target locale.
• Multi-modal and time-based routes. Should allow for mixing auto, pedestrian, bike and public transportation in the same route or setting a time by which one must arrive at a location.

Organization

The Valhalla organization is comprised of several library modules each responsible for a different function. The layout of the various modules is as follows:

• Midgard - Basic geographic and geometric algorithms for use in the various other projects.
• Baldr - The base data structures for accessing and caching tiled route data.
• Sif - Library used in costing of graph nodes and edges. This can be used as input to loki and thor.
• Skadi - Library and service for accessing elevation data. This can be used as input to mjolnir or as a standalone service.
• Mjolnir - Tools for turning open data into Valhalla graph tiles.
• Loki - Library used to search graph tiles and correlate input locations to an entity within a tile. This correlated entity (edge or vertex) can be used as input to thor.
• Meili - Library used to for map-matching.
• Thor - Library used to generate a path through the graph tile hierarchy. This path and attribution along the path can be used as input to odin.
• Odin - Library used to generate manoeuvres and narrative based on a path. This set of directions information can be used as input to tyr.
• Tyr - Service used to handle http requests for a route communicating with all of the other valhalla APIs. The service will format output from odin and support json (and eventually protocol buffer) output.
• Tools - A set command line tools that exercise bits of functionality from the library components above and provide the basis for quality testing and performance benchmarking.
• Demos - A set of demos which allows interacting with the service and APIs.
• Chef - A chef cookbook demonstrating how to deploy the valhalla stack to a virtual machine (sample vagrant file included).

Documentation

Technical documentation for the various components of the library can be found here: docs. Service API documentation as well as links to a variety of technical descriptions are provided within the valhalla-docs repository.

Get Valhalla from Personal Package Archive (PPA)

If you are running Ubuntu (trusty or xenial) Valhalla can be installed quickly and easily via PPA. Try the following:

# grab all of the valhalla software from ppa
sudo add-apt-repository -y ppa:valhalla-core/valhalla
sudo apt-get update
sudo apt-get install -y valhalla-bin

Building from Source

Valhalla uses CMake as build system.

To install on a Debian or Ubuntu system you need to install its dependencies with:

sudo add-apt-repository -y ppa:valhalla-core/valhalla
sudo apt-get update
sudo apt-get install -y autoconf automake make libtool pkg-config g++ gcc jq lcov protobuf-compiler vim-common libboost-all-dev libboost-all-dev libcurl4-openssl-dev zlib1g-dev liblz4-dev libprime-server0.6.3-dev libprotobuf-dev prime-server0.6.3-bin
#if you plan to compile with data building support, see below for more info
sudo apt-get install -y libgeos-dev libgeos++-dev liblua5.2-dev libspatialite-dev libsqlite3-dev lua5.2
if [[ $(grep -cF xenial /etc/lsb-release) > 0 ]]; then sudo apt-get install -y libsqlite3-mod-spatialite; fi
#if you plan to compile with python bindings, see below for more info
sudo apt-get install -y python-all-dev

To install on macOS, you need to install its dependencies with Homebrew:

# install dependencies (czmq is required by prime_server)
brew install autoconf automake libtool protobuf-c boost-python libspatialite pkg-config sqlite3 lua jq curl czmq lz4

Then clone and build prime_server

After getting the dependencies install it with:

git submodule update --init --recursive
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make -j$(nproc)
sudo make install

Important build options include:

Option	Behavior
-DENABLE_DATA_TOOLS (On/Off)	Build the data preprocessing tools
-DENABLE_PYTHON_BINDINGS (On/Off)	Build the python bindings
-DENABLE_SERVICES (On / Off)	Build the HTTP service
-DBUILD_SHARED_LIBS (On / Off)	Build static or shared libraries

For more build options run the interactive GUI:

cd build
cmake ..
ccmake ..

For more information on binaries, see Command Line Tools section below and the docs.

Running

The following bash should be enough to make some routing data and start a server using it. (Note - if you would like to run an elevation lookup service with Valhalla follow the instructions here).

#download some data and make tiles out of it
#NOTE: you can feed multiple extracts into pbfgraphbuilder
wget http://download.geofabrik.de/europe/switzerland-latest.osm.pbf http://download.geofabrik.de/europe/liechtenstein-latest.osm.pbf
#get the config and setup
mkdir -p valhalla_tiles
valhalla_build_config --mjolnir-tile-dir ${PWD}/valhalla_tiles --mjolnir-tile-extract ${PWD}/valhalla_tiles.tar --mjolnir-timezone ${PWD}/valhalla_tiles/timezones.sqlite --mjolnir-admin ${PWD}/valhalla_tiles/admins.sqlite > valhalla.json
#build routing tiles
#TODO: run valhalla_build_admins?
valhalla_build_tiles -c valhalla.json switzerland-latest.osm.pbf liechtenstein-latest.osm.pbf
#tar it up for running the server
find valhalla_tiles | sort -n | tar cf valhalla_tiles.tar --no-recursion -T -

#grab the demos repo and open up the point and click routing sample
git clone --depth=1 --recurse-submodules --single-branch --branch=gh-pages https://github.com/valhalla/demos.git
firefox demos/routing/index-internal.html &
#NOTE: set the environment pulldown to 'localhost' to point it at your own server

#start up the server
valhalla_service valhalla.json 1
#curl it directly if you like:
curl http://localhost:8002/route --data '{"locations":[{"lat":40.285488,"lon":-76.650597,"type":"break","city":"Hershey","state":"PA"},{"lat":40.794025,"lon":-77.860695,"type":"break","city":"State College","state":"PA"}],"costing":"auto","directions_options":{"units":"miles"}}' | jq '.'

#HAVE FUN!

Contributing

We welcome contributions to valhalla. If you would like to report an issue, or even better fix an existing one, please use the valhalla issue tracker on GitHub.

If you would like to make an improvement to the code, please be aware that all valhalla projects are written mostly in C++11. We use clang-format v7.0 to format the code. We welcome contributions as pull requests to the repository and highly recommend that your pull request include a test to validate the addition/change of functionality.

Note that our CI system checks that code formatting is consistent, and the build will fail if formatting rules aren't followed. Please run ./scripts/format.sh over your code before committing, to auto-format it in the projects preferred style.

Also note that we run some clang-tidy linting over the code as well (see .clang-tidy for the list of rules enforced). You can run ./scripts/tidy.sh over the code before committing to ensure you haven't added any of the common problems we check for (Note: ./scripts/tidy.sh requires the exitence of a compile_commands.json database. You can generate this file by running bear make instead of just make. The bear tool is installable on Ubuntu-based systems with apt-get install bear, and on macOS with brew install bear).

Tests

We highly encourage running and updating the tests to make sure no regressions have been made. We use the Automake test suite to run our tests by simply making the check target:

make check

Coverage reports are automatically generated using codecov for each pull request, but you can also build them locally by passing -DENABLE_COVERAGE=On and running make coverage.

Command Line Tools

valhalla_run_route

A C++ application that will create a route path with guidance instructions for the specified route request.

#Usage:
./valhalla_run_route -j '<JSON_ROUTE_REQUEST>' --config <CONFIG_FILE>
#Example:
./valhalla_run_route -j '{"locations":[{"lat":40.285488,"lon":-76.650597,"type":"break","city":"Hershey","state":"PA"},{"lat":40.794025,"lon":-77.860695,"type":"break","city":"State College","state":"PA"}],"costing":"auto","directions_options":{"units":"miles"}}' --config ../conf/valhalla.json

Batch Script Tool

• Batch Run_Route