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var poly;
var geodesicPoly;
var marker1;
var marker2;
function initialize() {
var mapOptions = {
zoom: 4,
center: new google.maps.LatLng(34, -40.605),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(
document.getElementById('info'));
marker1 = new google.maps.Marker({
map: map,
draggable: true,
position: new google.maps.LatLng(40.71435280, -74.0059731)
});
marker2 = new google.maps.Marker({
map: map,
draggable: true,
position: new google.maps.LatLng(48.8566140, 2.35222190)
});
var bounds = new google.maps.LatLngBounds(marker1.getPosition(),
marker2.getPosition());
map.fitBounds(bounds);
google.maps.event.addListener(marker1, 'position_changed', update);
google.maps.event.addListener(marker2, 'position_changed', update);
var polyOptions = {
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 3,
map: map,
};
poly = new google.maps.Polyline(polyOptions);
var geodesicOptions = {
strokeColor: '#CC0099',
strokeOpacity: 1.0,
strokeWeight: 3,
geodesic: true,
map: map
};
geodesicPoly = new google.maps.Polyline(geodesicOptions);
update();
}
function update() {
var path = [marker1.getPosition(), marker2.getPosition()];
poly.setPath(path);
geodesicPoly.setPath(path);
var heading = google.maps.geometry.spherical.computeHeading(path[0],
path[1]);
document.getElementById('heading').value = heading;
document.getElementById('origin').value = path[0].toString();
document.getElementById('destination').value = path[1].toString();
}
google.maps.event.addDomListener(window, 'load', initialize);
<!DOCTYPE html>
<html>
<head>
<title>Navigation functions (heading)</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<link href="/maps/documentation/javascript/examples/default.css" rel="stylesheet">
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&libraries=geometry"></script>
<script>
var poly;
var geodesicPoly;
var marker1;
var marker2;
function initialize() {
var mapOptions = {
zoom: 4,
center: new google.maps.LatLng(34, -40.605),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
map.controls[google.maps.ControlPosition.TOP_CENTER].push(
document.getElementById('info'));
marker1 = new google.maps.Marker({
map: map,
draggable: true,
position: new google.maps.LatLng(40.71435280, -74.0059731)
});
marker2 = new google.maps.Marker({
map: map,
draggable: true,
position: new google.maps.LatLng(48.8566140, 2.35222190)
});
var bounds = new google.maps.LatLngBounds(marker1.getPosition(),
marker2.getPosition());
map.fitBounds(bounds);
google.maps.event.addListener(marker1, 'position_changed', update);
google.maps.event.addListener(marker2, 'position_changed', update);
var polyOptions = {
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 3,
map: map,
};
poly = new google.maps.Polyline(polyOptions);
var geodesicOptions = {
strokeColor: '#CC0099',
strokeOpacity: 1.0,
strokeWeight: 3,
geodesic: true,
map: map
};
geodesicPoly = new google.maps.Polyline(geodesicOptions);
update();
}
function update() {
var path = [marker1.getPosition(), marker2.getPosition()];
poly.setPath(path);
geodesicPoly.setPath(path);
var heading = google.maps.geometry.spherical.computeHeading(path[0],
path[1]);
document.getElementById('heading').value = heading;
document.getElementById('origin').value = path[0].toString();
document.getElementById('destination').value = path[1].toString();
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map-canvas"></div>
<div id="panel" style="margin-left:-320px">
Origin: <input type="text" readonly id="origin">
Destination: <input type="text" readonly id="destination">
Heading: <input type="text" readonly id="heading"> degrees
</div>
</body>
</html>