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HERE Maps API - How to calculate a route between two points

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This article explains how to geo-code two locations and show the route between them using HERE Maps (providing that a valid route can be found).

Article Metadata
Code ExampleTested with
Devices(s): Internet Explorer, Google chrome, Firefox, Opera
Compatibility
Platform(s): Web browser
Dependencies: HERE Maps 2.5.3
Article
Keywords: HERE Maps, JavaScript, routing
Created: Maveric (21 Jun 2011)
Updated: avnee.nathani (31 Dec 2011)
Last edited: jasfox (12 Mar 2014)


Contents

Prerequisites

HERE Maps API supported web browser (basically any modern web browser)

Important note about maps credentials

Nokia provides several services options within the Maps API offering. The service is free to use, but you must obtain and use authentication and authorization credentials to use the services. Please read the Terms and Conditions and check the Pricing Plans page to decide which business model best fits your needs. Authentication requires unique Maps API credentials, namely an AppId and a token. You can get these credentials free for free following the instructions here

Implementation

In this example we will define two waypoints for the route; the geographical location of Berlin, Germany to the one of Paris, France. To be able to use routing we need to initialize a new nokia.maps.routing.Manager. We will cast the waypoints to it with some additional parameters. We want the shortest route with car and no toll roads with avoidTollroad, plus having the trafficMode set to default.

Example code

This example has all the required HTML and JavaScript code to perform the routing between Berlin, Germany and Paris, France. Remember to add in your own AppId and Token.

Note.pngNote: In order to use routing services, the with parameter of the script element's src attribute must be set to ?with=all

function makeRouteRequest(){
var waypoints = new nokia.maps.routing.WaypointParameterList();
 
waypoints.addCoordinate(
new nokia.maps.geo.Coordinate(52.500556, 13.398889)); // Berlin, Germany
waypoints.addCoordinate(
new nokia.maps.geo.Coordinate(48.856667, 2.350833)); // Paris, France
 
var modes = [{
type: "shortest",
transportModes: ["car"],
options: "avoidTollroad",
trafficMode: "default"
}];
 
router = new nokia.maps.routing.Manager();
router.addObserver("state", onRouteCalculated);
router.calculateRoute(waypoints, modes);
}
function onRouteCalculated(observedRouter, key, value){
if (value == "finished") {
var routes = observedRouter.getRoutes();
 
//create the default map representation of a route
var mapRoute =
new nokia.maps.routing.component.RouteResultSet(
routes[0]).container; //first option found
map.objects.add(mapRoute);
 
//Zoom to the bounding box of the route
map.zoomTo(mapRoute.getBoundingBox(), false, "default");
} else if(value == "failed") {
alert("The routing request failed.");
}
}


NokiaMapsRoute.png

A working example can be found at:

http://heremaps.github.io/examples/examples.html#routing-from-a-to-b

For more on the HERE Maps API

Please check out the HERE Maps API full documentation and API reference here:

You may also access the interactive API explorer

And additional examples on GitHub

This page was last modified on 12 March 2014, at 20:29.
319 page views in the last 30 days.