valh: Shortest Paths and Travel Time with the OpenStreetMap-Based...

In valh: Interface Between R and the OpenStreetMap-Based Routing Service Valhalla

Shortest Paths and Travel Time with the OpenStreetMap-Based Routing Service Valhalla

Description

An interface between R and the Valhalla API.
Valhalla is a routing service based on OpenStreetMap data. See https://valhalla.github.io/valhalla/ for more information.
This package enables the computation of routes, trips, isochrones and travel distances matrices.

• vl_matrix: Build and send Valhalla API queries to get travel time matrices between points. This function interfaces the matrix Valhalla service.

• vl_route: Build and send a Valhalla API query to get the travel geometry between two points. This function interfaces with the route Valhalla service.

• vl_optimized_route: Build and send a Valhalla API query to get the shortest travel geometry between multiple unordered points. This function interfaces the optimized_route Valhalla service. Use this function to resolve the travelling salesman problem.

• vl_locate: Build and send an Valhalla API query to get the nearest point on the street network. This function interfaces the locate Valhalla service.

• vl_isochrone: This function computes areas that are reachable within a given time span (or road distance) from a point and returns the reachable regions as polygons. These areas of equal travel time are called isochrones. This function interfaces the isochrone & isodistance Valhalla service.

• vl_elevation: Build and send a Valhalla API query to get the elevation at a set of input locations. This function interfaces with the height Valhalla service.

• vl_status: Build and send a Valhalla API query to get information on the Valhalla server (version etc.).. This function interfaces with the status Valhalla service.

Note

This package relies on the usage of a running Valhalla service (tested with versions 3.4.x & 3.5.x of Valhalla).

To use a custom Valhalla instance, you just need to change the valh.server option to the url of the instance :
options(valh.server = "http://address.of.the.server/")
You can also set this option in your .Rprofile file to make it permanent.

The package ships a sample dataset of 100 random pharmacies in Berlin (© OpenStreetMap contributors - https://www.openstreetmap.org/copyright/en).
The sf dataset uses the projection WGS 84 / UTM zone 34N (EPSG:32634).
The csv dataset uses WGS 84 (EPSG:4326).

Author(s)

Maintainer: Timothée Giraud [e-mail] (ORCID)

Authors:

• Matthieu Viry (ORCID)

See Also

Useful links:

• https://github.com/riatelab/valh

• Report bugs at https://github.com/riatelab/valh/issues

valh documentation built on April 11, 2025, 6:14 p.m.