<html>
<head>
<title>Distance between two points</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
// This example requires the Geometry library. Include the libraries=geometry
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=geometry">
var marker1, marker2;
var poly, geodesicPoly;
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: {lat: 34, lng: -40.605}
});
marker1 = new google.maps.Marker({
map: map,
position: {lat: 42.9814292, lng: -70.9477546}
});
marker2 = new google.maps.Marker({
map: map,
position: {lat: 51.5073509, lng: -0.1277583}
});
var bounds = new google.maps.LatLngBounds(
marker1.getPosition(), marker2.getPosition());
map.fitBounds(bounds);
poly = new google.maps.Polyline({
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 3,
map: map,
});
geodesicPoly = new google.maps.Polyline({
strokeColor: '#CC0099',
strokeOpacity: 1.0,
strokeWeight: 3,
geodesic: true,
map: map
});
var path = [marker1.getPosition(), marker2.getPosition()];
poly.setPath(path);
geodesicPoly.setPath(path);
var heading = google.maps.geometry.spherical.computeHeading(path[0], path[1]);
var distance = google.maps.geometry.spherical.computeDistanceBetween(path[0], path[1]);
var midpoint = google.maps.geometry.spherical.interpolate(path[0], path[1], 0.5);
var infoWindow = new google.maps.InfoWindow({
content: "Distance: " + distance/1000 + " kilometers",
position: midpoint
});
infoWindow.open(map);
}
</script>
<script src="https://maps.googleapis.com/maps/api/js?libraries=geometry&callback=initMap"
async defer></script>
</body>
</html>
Output
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