I am working on a Google Maps prototype and I would like to draw a line connecting each of the markers on my map. However, currently I am hardcoding the coordinates for the line separate from the coordinates used for the markers and was wondering how I can make it dynamic so that I only have to add markers and the line will automatically be generated from those points.
The portion of the script I want to be generated dynamically is commented
Here's my current code:
<!DOCTYPE html>
<html>
<head>
<title>Travel Log</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp"></script>
<script>
var map;
var locations = [
['Mankato, MN', 44.1834814, -93.9774519, 1],
['Duluth, MN', 46.7649885, -92.1112232, 2],
['Rochester, MN', 43.9959876, -92.4811724, 3],
['Fargo, ND', 46.8541979, -96.8285138, 4],
['Minneapolis, MN', 44.970697, -93.2614785, 5]
];
function initialize() {
var mapOptions = {
zoom: 5,
center: new google.maps.LatLng(46.4418595,-93.3655146)
};
map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
/////////////////////////////////////////
//This is the part I want to be dynamic//
/////////////////////////////////////////
var lineCoordinates = [
new google.maps.LatLng(44.1834814, -93.9774519),
new google.maps.LatLng(46.7649885, -92.1112232),
new google.maps.LatLng(43.9959876, -92.4811724),
new google.maps.LatLng(46.8541979, -96.8285138),
new google.maps.LatLng(44.970697, -93.2614785)
];
var tripPath = new google.maps.Polyline({
path: lineCoordinates,
geodesic: true,
strokeColor: '#000',
strokeOpacity: 1.0,
strokeWeight: 2
});
tripPath.setMap(map);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map-canvas"></div>
</body>
</html>
You could do this using the Array.prototype.map() method quite nicely;
var lineCoordinates = locations.map(function (val) {
return new google.maps.LatLng(val[1], val[2]);
});