Drawing multiple route Google Map

Question

I would like to draw multiple routes based on the directions service in Google, the code goes below

p/s:Data is a list I obtained from my json call

for          


        

Answer 1

You need separate google.maps.DirectionsRenderer object for each route. Something like that:

var routes = [{origin: ..., destination: ...}, {origin: ..., destination: ...}, {origin: ..., destination: ...}];
var rendererOptions = {
    preserveViewport: true,         
    suppressMarkers:true,
    routeIndex:i
};
var directionsService = new google.maps.DirectionsService();

routes.each(function(route){
    var request = {
        origin: route.origin,
        destination: route.destination,
        travelMode: google.maps.TravelMode.DRIVING
    };

    var directionsDisplay = new google.maps.DirectionsRenderer(rendererOptions);
    directionsDisplay.setMap(map);

    directionsService.route(request, function(result, status) {
        console.log(result);

        if (status == google.maps.DirectionsStatus.OK) {
            directionsDisplay.setDirections(result);
        }
    });
});

I'm using prototype.js, so your method of array walking may differ.

Answer 2

I have get the solution for multiple routes based on the directions service in Google For more reference click here!

<script type="text/javascript" src="//maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
    var my={directionsSVC:new google.maps.DirectionsService(),maps:{},routes:{}};
    /**
        * base-class     
        * @param points optional array array of lat+lng-values defining a route
        * @return object Route
    **/                     
    function Route(points) {
        this.origin       = null;
        this.destination  = null;
        this.waypoints    = [];
        if(points && points.length>1) { this.setPoints(points);}
        return this; 
    };

    /**
        *  draws route on a map 
        *              
        * @param map object google.maps.Map 
        * @return object Route
    **/                    
    Route.prototype.drawRoute = function(map) {
        var _this=this;
        my.directionsSVC.route(
          {"origin": this.origin,
           "destination": this.destination,
           "waypoints": this.waypoints,
           "travelMode": google.maps.DirectionsTravelMode.DRIVING
          },
          function(res,sts) {
                if(sts==google.maps.DirectionsStatus.OK){
                    if(!_this.directionsRenderer) { _this.directionsRenderer=new google.maps.DirectionsRenderer({ "draggable":true }); }
                    _this.directionsRenderer.setMap(map);
                    _this.directionsRenderer.setDirections(res);
                    google.maps.event.addListener(_this.directionsRenderer,"directions_changed", function() { _this.setPoints(); } );
                }   
          });
        return _this;
    };

    /**
    * sets map for directionsRenderer     
    * @param map object google.maps.Map
    **/             
    Route.prototype.setGMap = function(map){ this.directionsRenderer.setMap(map); };

    /**
    * sets origin, destination and waypoints for a route 
    * from a directionsResult or the points-param when passed    
    * 
    * @param points optional array array of lat+lng-values defining a route
    * @return object Route        
    **/
    Route.prototype.setPoints = function(points) {
        this.origin = null;
        this.destination = null;
        this.waypoints = [];
        if(points) {
          for(var p=0;p<points.length;++p){
            this.waypoints.push({location:new google.maps.LatLng(points[p][0], points[p][1]),stopover:false});
          }
          this.origin=this.waypoints.shift().location;
          this.destination=this.waypoints.pop().location;
        }
        else {
          var route=this.directionsRenderer.getDirections().routes[0];
          for(var l=0;l<route.legs.length;++l) {
            if(!this.origin)this.origin=route.legs[l].start_location;
            this.destination = route.legs[l].end_location;

            for(var w=0;w<route.legs[l].via_waypoints.length;++w) { this.waypoints.push({location:route.legs[l].via_waypoints[w], stopover:false});}
          }
          //the route has been modified by the user when you are here you may call now this.getPoints() and work with the result
        }
        return this;
    };

    /**
    * retrieves points for a route 
    *         
    * @return array         
    **/
    Route.prototype.getPoints = function() {
      var points=[[this.origin.lat(),this.origin.lng()]];

      for(var w=0;w<this.waypoints.length;++w) { points.push([this.waypoints[w].location.lat(), this.waypoints[w].location.lng()]);}
      points.push([this.destination.lat(), this.destination.lng()]);
      return points;
    };

    function initialize() {
      var myOptions = { zoom: 8, center: new google.maps.LatLng(-34.397, 150.644), mapTypeId: google.maps.MapTypeId.ROADMAP };
        my.maps.map1 = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

        my.routes.r0 = new Route([[55.930385, -3.118425],[50.909700, -1.40435]]).drawRoute(my.maps.map1);
        my.routes.r1 = new Route([[51.454513, -2.58790],[52.6308859, 1.2973550]]).drawRoute(my.maps.map1);

        my.routes.rx=new Route();
    }
    google.maps.event.addDomListener(window, "load", initialize);
</script>

<div id="map_canvas" style="height:300px;width:300px;"></div>

Answer 3

In image u can see 2 routes in single map

Drawing multiple route Google Map with waypoints on route

---

 <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>

  var map;

  var directionsService;
  var stepDisplay;

  var position;
  var marker = [];
  var polyline = [];
  var poly2 = [];
  var poly = null;
  var startLocation = [];
  var endLocation = [];
  var timerHandle = [];




  var stops_data = [[ {"Geometry":{"Latitude":23.05242,"Longitude":72.53375}},

                      {"Geometry":{"Latitude":23.03007,"Longitude":72.59664}}

                    ] ,[ {"Geometry":{"Latitude":23.00959,"Longitude":72.56189}},
                         {"Geometry":{"Latitude":23.05754,"Longitude":72.55302}}
                       ]];



  var a,z,b;

  var add;
  var map; 

  var speed = 0.000005, wait = 1;
  var infowindow = null;

  var myPano;   
  var panoClient;
  var nextPanoId;


  //    var locations=new Array(new google.maps.LatLng(34.04429454929703, -118.22793351693724),new google.maps.LatLng(33.688522885631706, -116.15151750131224));


    //  var locations2=new Array(
    //      new google.maps.LatLng(32.69561555501597, -117.06338273568724),new google.maps.LatLng(34.525395303965354, -117.27212297006224));





      var directionsDisplay = [];

      directionsDisplay[0] = new window.google.maps.DirectionsRenderer({
          suppressMarkers: false,
          suppressInfoWindows: true
        });


      directionsDisplay[1] = new window.google.maps.DirectionsRenderer({
          suppressMarkers: false,
          suppressInfoWindows: true
        });

      var map;
      var mapOptions = { center: new google.maps.LatLng(42.5584308, -70.8597732), zoom: 3,
        mapTypeId: google.maps.MapTypeId.ROADMAP };

      function initialize() 
      {
        map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);


        directionsService = new google.maps.DirectionsService();


     //   Setroute(locations[0],locations[1],directionsDisplay[0]);

       // Setroute(locations2[0],locations2[1],directionsDisplay[1]);


        Tour_startUp(stops_data[0]);

        window.tour.loadMap(map, directionsDisplay[0]);
       // window.tour.fitBounds(map);



        if (stops_data[0].length > 1)
            window.tour.calcRoute(stops_data[0],directionsService, directionsDisplay[0]);



        Tour_startUp(stops_data[1]);
        window.tour.loadMap(map, directionsDisplay[1]);
        window.tour.calcRoute(stops_data[1],directionsService, directionsDisplay[1]);
       // window.tour.fitBounds(map);





      }





function Tour_startUp(stops) {

    //  alert('first'+stops.length);     

    if (!window.tour) window.tour = {
        updateStops: function (newStops) {
            stops = newStops;
        },


        // map: google map object
        // directionsDisplay: google directionsDisplay object (comes in empty)
        loadMap: function (map, dirdis) {
            var myOptions = {
                zoom: 15,
                center: new window.google.maps.LatLng(51.507937, -0.076188), // default to London
                mapTypeId: window.google.maps.MapTypeId.ROADMAP
            };
            map.setOptions(myOptions);
            dirdis.setMap(map);
        },



        calcRoute: function (stops_new,directionsService, dirdis) {
            var batches = [];
            var itemsPerBatch = 10; // google API max = 10 - 1 start, 1 stop, and 8 waypoints
            var itemsCounter = 0;
            var wayptsExist = stops_new.length > 0;
            var time= [];
            while (wayptsExist) {
                var subBatch = [];
                var subitemsCounter = 0;

               // alert('second'+stops_new.length);        
        //alert(stops_new[0].Geometry.Latitude +' ===== ' +stops_new[0].Geometry.Longitude);


                for (var j = itemsCounter; j < stops_new.length; j++) {
                    subitemsCounter++;

                //alert(stops[j].Geometry.Time);



                    subBatch.push({
                        location: new window.google.maps.LatLng(stops_new[j].Geometry.Latitude, stops_new[j].Geometry.Longitude),
                        stopover: true

                    });

                   //time.push(stops[j].Geometry.Time);

                    if (subitemsCounter == itemsPerBatch)
                        break;
                }

                itemsCounter += subitemsCounter;
                batches.push(subBatch);
                wayptsExist = itemsCounter < stops_new.length;
                // If it runs again there are still points. Minus 1 before continuing to
                // start up with end of previous tour leg
                itemsCounter--;
            }

            // now we should have a 2 dimensional array with a list of a list of waypoints
            var combinedResults;
            var unsortedResults = [{}]; // to hold the counter and the results themselves as they come back, to later sort
            var directionsResultsReturned = 0;




            for (var k = 0; k < batches.length; k++) {
                var lastIndex = batches[k].length - 1;
                var start = batches[k][0].location;
                var end = batches[k][lastIndex].location;

                // trim first and last entry from array
                var waypts = [];
                waypts = batches[k];
                waypts.splice(0, 1);
                waypts.splice(waypts.length - 1, 1);

                var request = 
                    {
                    origin: start,
                    destination: end,
                    waypoints: waypts,
                    travelMode: window.google.maps.TravelMode.WALKING
                };

              //  alert('start'+start);

             //   alert('end'+end);

                (function (kk) {
                    directionsService.route(request, function (result, status) {



                        if (status == window.google.maps.DirectionsStatus.OK) {

                             polyline[0] = new google.maps.Polyline({
                                 path: [],
                                 strokeColor: '#FFFF00',
                                 strokeWeight: 3
                                 });


                             poly2[0] = new google.maps.Polyline({
                                 path: [],
                                 strokeColor: '#FFFF00',
                                 strokeWeight: 3
                                 });     


                            var unsortedResult = { order: kk, result: result };
                            unsortedResults.push(unsortedResult);

                            directionsResultsReturned++;

                            if (directionsResultsReturned == batches.length) // we've received all the results. put to map
                            {
                                // sort the returned values into their correct order
                                unsortedResults.sort(function (a, b) { return parseFloat(a.order) - parseFloat(b.order); });
                                var count = 0;
                                for (var key in unsortedResults) {
                                    if (unsortedResults[key].result != null) {
                                        if (unsortedResults.hasOwnProperty(key)) {
                                            if (count == 0) // first results. new up the combinedResults object
                                                combinedResults = unsortedResults[key].result;
                                            else {
                                                // only building up legs, overview_path, and bounds in my consolidated object. This is not a complete
                                                // directionResults object, but enough to draw a path on the map, which is all I need
                                                combinedResults.routes[0].legs = combinedResults.routes[0].legs.concat(unsortedResults[key].result.routes[0].legs);
                                                combinedResults.routes[0].overview_path = combinedResults.routes[0].overview_path.concat(unsortedResults[key].result.routes[0].overview_path);

                                                combinedResults.routes[0].bounds = combinedResults.routes[0].bounds.extend(unsortedResults[key].result.routes[0].bounds.getNorthEast());
                                                combinedResults.routes[0].bounds = combinedResults.routes[0].bounds.extend(unsortedResults[key].result.routes[0].bounds.getSouthWest());
                                            }
                                            count++;
                                        }
                                    }
                                }
                                dirdis.setDirections(combinedResults);


                                var legs = combinedResults.routes[0].legs;

                                var path = combinedResults.routes[0].overview_path;

                                //alert(path.length);

                             //  alert(legs.length);

                              //setRoutes(legs[0].start_location,legs[legs.length-1].end_location);



                                for (var i=0; i < legs.length;i++)
                                    {
                                          var markerletter = "A".charCodeAt(0);
                                          markerletter += i;
                                  markerletter = String.fromCharCode(markerletter);

                                  if (i == 0) { 

                                    //marker[0] = createMarker2(legs[i].start_location,"start",legs[i].start_address,"green");
                                  }

                                  var steps = legs[i].steps;

                                //  alert('arrival time : '+legs[i].arrival_time.text);

                            //  var duration = steps.duration_in_traffic;

                              // alert(duration.text);

                                  for (j=0;j<steps.length;j++) 
                                  {

                                      var nextSegment = steps[j].path;

                                      for (k=0;k<nextSegment.length;k++) 
                                          {
                                          polyline[0].getPath().push(nextSegment[k]);
                                          //bounds.extend(nextSegment[k]);
                                             }
                                  }



                                //  createMarker(directionsDisplay.getMap(),legs[i].start_location,"marker"+i,"some text for marker "+i+"<br>"+legs[i].start_address,markerletter);   
                                }
                                    // Marker for start point 
                                createMarker(dirdis.getMap(),legs[0].start_location,"marker"+0,"Start Point<br>"+legs[0].start_address,'A');


                                var i=legs.length;
                                var markerletter = "A".charCodeAt(0);
                                  markerletter += i;
                                markerletter = String.fromCharCode(markerletter);

                                // marker for End Point 
                                createMarker(dirdis.getMap(),legs[legs.length-1].end_location,"marker"+i,"End Point <br>"+legs[legs.length-1].end_address,'B');

                                polyline[0].setMap(map);

                                //startAnimation(0);  
                            }
                        }
                    });
                })(k);
            }
        }
    };
}


var icons = new Array();
icons["red"] = new google.maps.MarkerImage("mapIcons/marker_red.png",
      // This marker is 20 pixels wide by 34 pixels tall.
      new google.maps.Size(20, 34),
      // The origin for this image is 0,0.
      new google.maps.Point(0,0),
      // The anchor for this image is at 9,34.
      new google.maps.Point(9, 34));



function getMarkerImage(iconStr) {

//alert(iconStr);

   if ((typeof(iconStr)=="undefined") || (iconStr==null)) { 
      iconStr = "red"; 
   }

if(iconStr == 'A')
{
   // for start point 


   if (!icons[iconStr]) {
      icons[iconStr] = new google.maps.MarkerImage("http://www.google.com/mapfiles/dd-start.png",
      // This marker is 20 pixels wide by 34 pixels tall.
      new google.maps.Size(20, 34),
      // The origin for this image is 0,0.
      new google.maps.Point(0,0),
      // The anchor for this image is at 6,20.
      new google.maps.Point(9, 34));
   } 

}
if (iconStr == 'B')
{

    // for end point


    if (!icons[iconStr]) {
          icons[iconStr] = new google.maps.MarkerImage("http://www.google.com/mapfiles/dd-end.png",
          // This marker is 20 pixels wide by 34 pixels tall.
          new google.maps.Size(20, 34),
          // The origin for this image is 0,0.
          new google.maps.Point(0,0),
          // The anchor for this image is at 6,20.
          new google.maps.Point(9, 34));
       } 


    }
return icons[iconStr];
}
  // Marker sizes are expressed as a Size of X,Y
  // where the origin of the image (0,0) is located
  // in the top left of the image.

  // Origins, anchor positions and coordinates of the marker
  // increase in the X direction to the right and in
  // the Y direction down.

  var iconImage = new google.maps.MarkerImage('mapIcons/marker_red.png',
      // This marker is 20 pixels wide by 34 pixels tall.
      new google.maps.Size(20, 34),
      // The origin for this image is 0,0.
      new google.maps.Point(0,0),
      // The anchor for this image is at 9,34.
      new google.maps.Point(9, 34));



  var iconShadow = new google.maps.MarkerImage('http://www.google.com/mapfiles/shadow50.png',
      // The shadow image is larger in the horizontal dimension
      // while the position and offset are the same as for the main image.
      new google.maps.Size(37, 34),
      new google.maps.Point(0,0),
      new google.maps.Point(9, 34));
      // Shapes define the clickable region of the icon.
      // The type defines an HTML &lt;area&gt; element 'poly' which
      // traces out a polygon as a series of X,Y points. The final
      // coordinate closes the poly by connecting to the first
      // coordinate.
  var iconShape = {
      coord: [9,0,6,1,4,2,2,4,0,8,0,12,1,14,2,16,5,19,7,23,8,26,9,30,9,34,11,34,11,30,12,26,13,24,14,21,16,18,18,16,20,12,20,8,18,4,16,2,15,1,13,0],
      type: 'poly'
  };


function createMarker(map, latlng, label, html, color) {

//alert(color);
//  alert("createMarker("+latlng+","+label+","+html+","+color+")");


    var contentString = '<b>'+label+'</b><br>'+html;

    var marker = new google.maps.Marker({
        position: latlng,
        map: map,
        shadow: iconShadow,
        icon: getMarkerImage(color),
        shape: iconShape,
        title: label,
        zIndex: Math.round(latlng.lat()*-100000)<<5
        });
        marker.myname = label;

    google.maps.event.addListener(marker, 'click', function() {
        infowindow.setContent(contentString); 
        infowindow.open(map,marker);
        });


    return marker;
}

function createMarkerForStops(map, latlng, label, html, color) {
    // alert("createMarker("+latlng+","+label+","+html+","+color+")");


   var contentString = '<b>'+label+'</b><br>'+html;

        var marker = new google.maps.Marker({
            position: latlng,
            map: map,
            title: label,
            //icon:'http://google-maps-icons.googlecode.com/files/stop.png',
            icon:'icon/stop.png',
            zIndex: Math.round(latlng.lat()*-100000)<<5
            });
            marker.myname = label;


        google.maps.event.addListener(marker, 'click', function() {
            infowindow.setContent(contentString); 
            infowindow.open(map,marker);
            });
        return marker;
    }


      google.maps.event.addDomListener(window, 'load', initialize);

</script>

<div id="map_canvas"></div>

Answer 4

If you have everything else set up, but are only getting one route to show up on your map, the problem is likely that you are not resetting the DirectionsRenderer to null before reusing it.

Each DirectionsRenderer can only be used to render one route. So if you are cycling through an array and creating a variable like renderer each time, you have to make sure to reset it to null and create a new one.

For example

for (all routes){
     directionsRenderer = new google.maps.DirectionsRenderer(optionsDictionary);
     //call route(), define call back function, etc.
     directionsRenderer = null;
}