google maps displaying a route
according to google maps i can plan a route that crosses over several waypoints. It is explained here:http://code.google.com/intl/nl-NL/apis/maps/documentation/javascript/services.html#Routes
Now the api wants me to add the waypoints like this:
location: waypoints
so waypoints is an array wich i have to assign to the location: parameter but from what ive seen in the demo they fill the array with strings of the locations. What i was wondering if it was possible to pass the latitude and longitude instead of the strings?
update: this is the part where i try to create a route. i have put the same value in location throughout the entire loop for now but id doesn't work if i use variable values neither
funct开发者_Python百科ion calcRoute() {
var waypts = [];
for (var i in owt.stores.spotStore.data.map) {
waypts.push({
location: new google.maps.LatLng(12.3, -33.6),
stopover:true
});
console.log(waypts);
}
var request = {
origin: new google.maps.LatLng(50.82788, 3.26499),
destination: new google.maps.LatLng(50.82788, 3.26499),
waypoints: waypts,
optimizeWaypoints: true,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
}
});
}
;
According to the API reference:
A DirectionsWaypoint represents a location between origin and destination through which the trip should be routed.
location LatLng|string Waypoint location. Can be an address string or LatLng. Optional
So creating a new Waypoint with a lat-long value should be as below
return {
location:new google.maps.LatLng(12.3, -33.6),
stopover:true
};
According to google documentation the waypoint can be either a string or a LatLng object. http://code.google.com/apis/maps/documentation/javascript/reference.html#DirectionsWaypoint
here is an example using LatLng
<!DOCTYPE html>
<html>
<head><meta name="viewport" content="initial-scale=1.0, user-scalable=no"/><meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Directions Waypoints</title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">
</script>
<script type="text/javascript">
var directionDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var chicago = new google.maps.LatLng(-40.321, 175.54);
var myOptions = {
zoom: 6,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: chicago
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
directionsDisplay.setMap(map);
calcRoute();
}
function calcRoute() {
var waypts = [];
stop = new google.maps.LatLng(-39.419, 175.57)
waypts.push({
location:stop,
stopover:true});
start = new google.maps.LatLng(-40.321, 175.54);
end = new google.maps.LatLng(-38.942, 175.76);
var request = {
origin: start,
destination: end,
waypoints: waypts,
optimizeWaypoints: true,
travelMode: google.maps.DirectionsTravelMode.WALKING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
var route = response.routes[0];
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:70%;height:80%;">
</div>
<br />
<div>
</div>
</body>
</html>
The way points can be either a string or a latlng.
http://code.google.com/intl/nl-NL/apis/maps/documentation/javascript/services.html#Directions
In particular:
waypoints[] (optional) specifies an array of DirectionsWaypoints. Waypoints alter a route by routing it through the specified location(s). A waypoint is specified as an object literal with fields shown below:
location specifies the location of the waypoint, either as a LatLng or asa String which will be geocoded. stopover is a boolean which indicates that the waypoint is a stop on the route, which has the effect of splitting the route into two routes.
(For more information on waypoints, see Using Waypoints in Routes below.)
EDIT
Your way points are not valid for routing, i.e. they are in water - try centering a map on (12, -33.6).
Here's a sample using way points (not the prettiest code, but it's an example ;) ).
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script type="text/javascript">
var myRouter = {
map_: null,
directionsHelper_: null,
stores: [
{name: "store1", location: new google.maps.LatLng(50.82788, 3.76499)},
{name: "store2", location: new google.maps.LatLng(51.02788, 3.9)}
],
calcRoute: function() {
var waypts = [];
for (var i in this.stores) {
waypts.push({
location: this.stores[i].location,
stopover:true
});
}
var request = {
origin: new google.maps.LatLng(50.82788, 3.26499),
destination: "Antwerp",
waypoints: waypts,
optimizeWaypoints: true,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
var _SELF = this;
this.directionsHelper_.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
_SELF.directionsDisplay_.setDirections(response);
return;
}
console.log('Directions Status: ' + status);
});
},
init: function(mapid) {
this.directionsHelper_ = new google.maps.DirectionsService();
this.directionsDisplay_ = new google.maps.DirectionsRenderer();
var center = new google.maps.LatLng(50.82788, 3.26499);
var myOptions = {
zoom:7,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: center
}
this.map_ = new google.maps.Map(document.getElementById(mapid), myOptions);
this.directionsDisplay_.setMap(this.map_);
this.calcRoute();
}
};
$(document).ready(function() {
myRouter.init('map');
});
</script>
<style type="text/css">
#map {
height: 500px;
width: 600px;
border: 1px solid #000;
}
</style>
</head>
<body>
<div id="map"></div>
</body>
</html>
加载中,请稍侯......
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