CODEWITHSUNDEEP
javascriptgoogle-maps
Yawn
Yawn

Reputation: 519

Directions distance in Google Maps API v3

I'm trying to work out how to use the Google Maps Directions Demo to get the distance from the successful directions.

This is the code I have so far:

var googleMaps = {
  // HTML Nodes
  fromInput: google_maps_from,
  toInput: google_maps_to,

  // API Objects
  dirService: new google.maps.DirectionsService(),
  dirRenderer: new google.maps.DirectionsRenderer(),
  map: null,

  showDirections: function(dirResult, dirStatus) {
    if (dirStatus != google.maps.DirectionsStatus.OK) 
    {
     //Here we'll handle the errors a bit better :P
      alert('Directions failed: ' + dirStatus);
      return;
    }
    else
    {
     //Get the distance here
     //onGDirectionsLoad();
    }

    // Show directions
    googleMaps.dirRenderer.setMap(googleMaps.map);
    googleMaps.dirRenderer.setPanel(document.getElementById("directions"));
    googleMaps.dirRenderer.setDirections(dirResult);
  },

  getSelectedTravelMode: function() {
    return google.maps.DirectionsTravelMode.DRIVING;
  },

  getSelectedUnitSystem: function() {
    return google.maps.DirectionsUnitSystem.METRIC;
  },

  getDirections: function() {
    var fromStr = googleMaps.fromInput;
    var toStr = googleMaps.toInput;
    var dirRequest = {
      origin: fromStr,
      destination: toStr,
      travelMode: googleMaps.getSelectedTravelMode(),
      unitSystem: googleMaps.getSelectedUnitSystem(),
      provideTripAlternatives: true
    };
    googleMaps.dirService.route(dirRequest, googleMaps.showDirections);
  },

  init: function() {
    googleMaps.map = new google.maps.Map(document.getElementById("map_canvas"), {
      zoom: 13,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });
    // Show directions onload
    googleMaps.getDirections();
  }
};

// Onload handler to fire off the app.
google.maps.event.addDomListener(window, 'load', googleMaps.init);

I could do this just fine in v2, just having trouble working out the v3 equivalent.

Upvotes: 16

Views: 45334

Answers (2)

Radoslav Trenev
Radoslav Trenev

Reputation: 373

The chosen answer works properly if the route has only one waypoint. Here's how to get the full length if you have multiple waypoints:

var distance= 0;
for(i = 0; i < response.routes[0].legs.length; i++){
   distance += parseFloat(response.routes[0].legs[i].distance.value);
       //for each 'leg'(route between two waypoints) we get the distance and add it to the total
}   
console.log(distance);

Upvotes: 3

Daniel Vassallo
Daniel Vassallo

Reputation: 344511

While it does not seem to be documented officially, it looks like you can traverse the response from the DirectionsService.route() method: response.trips[0].routes[0].distance.value, as in the following example:

<!DOCTYPE html>
<html> 
<head> 
   <meta http-equiv="content-type" content="text/html; charset=UTF-8"/> 
   <title>Google Maps JavaScript API v3 Example: Directions Complex</title> 
   <script type="text/javascript" 
           src="http://maps.google.com/maps/api/js?sensor=false"></script>
</head> 
<body style="font-family: Arial; font-size: 13px; color: red;"> 
   <div id="map" style="width: 400px; height: 300px;"></div> 
   <div id="duration">Duration: </div> 
   <div id="distance">Distance: </div> 

   <script type="text/javascript"> 

   var directionsService = new google.maps.DirectionsService();
   var directionsDisplay = new google.maps.DirectionsRenderer();

   var myOptions = {
     zoom:7,
     mapTypeId: google.maps.MapTypeId.ROADMAP
   }

   var map = new google.maps.Map(document.getElementById("map"), myOptions);
   directionsDisplay.setMap(map);

   var request = {
       origin: 'Chicago', 
       destination: 'New York',
       travelMode: google.maps.DirectionsTravelMode.DRIVING
   };

   directionsService.route(request, function(response, status) {
      if (status == google.maps.DirectionsStatus.OK) {

         // Display the distance:
         document.getElementById('distance').innerHTML += 
            response.routes[0].legs[0].distance.value + " meters";

         // Display the duration:
         document.getElementById('duration').innerHTML += 
            response.routes[0].legs[0].duration.value + " seconds";

         directionsDisplay.setDirections(response);
      }
   });
   </script> 
</body> 
</html>

Screenshot showing distance and duration: Google Maps API v3 Directions Demo

Upvotes: 52

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