Below code shows the path between two latlongs :
JavaScript
x
52
52
1
function mapLocation() {2
var directionsDisplay;3
var directionsService = new google.maps.DirectionsService();4
var map;5
6
function initialize() {7
directionsDisplay = new google.maps.DirectionsRenderer({8
draggable: true9
});10
var city = new google.maps.LatLng(41.015137, 28.979530);11
var mapOptions = {12
zoom: 7,13
center: city 14
};15
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);16
directionsDisplay.setMap(map);17
calcRoute();18
}19
20
function calcRoute() {21
var start = new google.maps.LatLng(41.01524, 28.975994);22
var end = new google.maps.LatLng(41.013232, 28.978676);23
24
var request = {25
origin: start,26
destination: end,27
travelMode: google.maps.TravelMode.DRIVING28
29
};30
directionsService.route(request, function(response, status) {31
if (status == google.maps.DirectionsStatus.OK) {32
alert(response.routes[0].legs[0].distance.value + " meters");33
directionsDisplay.setDirections(response);34
directionsDisplay.setMap(map);35
36
//alert(request.distance);37
} else {38
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);39
}40
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});42
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}47
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google.maps.event.addDomListener(window, 'load', initialize);50
}51
mapLocation();52
The code always works, I can see the path all the time when I drag those two latlongs. But I want to get the position of latlongs after dragging. How can I do that? I tried to put alerts in various places in the codes but none of them worked. Can you help me with that?
JavaScript
1
51
51
1
function mapLocation() {2
var directionsDisplay;3
var directionsService = new google.maps.DirectionsService();4
var map;5
6
function initialize() {7
directionsDisplay = new google.maps.DirectionsRenderer({8
draggable: true9
});10
var city = new google.maps.LatLng(41.015137, 28.979530);11
var mapOptions = {12
zoom: 7,13
center: city 14
};15
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);16
directionsDisplay.setMap(map);17
calcRoute();18
}19
20
function calcRoute() {21
var start = new google.maps.LatLng(41.01524, 28.975994);22
var end = new google.maps.LatLng(41.013232, 28.978676);23
24
var request = {25
origin: start,26
destination: end,27
travelMode: google.maps.TravelMode.DRIVING28
29
};30
directionsService.route(request, function(response, status) {31
if (status == google.maps.DirectionsStatus.OK) {32
//alert(response.routes[0].legs[0].distance.value + " meters");33
directionsDisplay.setDirections(response);34
directionsDisplay.setMap(map);35
36
//alert(request.distance);37
} else {38
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);39
}40
41
});42
43
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}47
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google.maps.event.addDomListener(window, 'load', initialize);50
}51
mapLocation();JavaScript
1
8
1
html,2
body,3
#map-canvas {4
height: 90%;5
width: 100%;6
margin: 0px;7
padding: 0px8
}JavaScript
1
5
1
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>2
3
<body>4
<!-- <input type="button" id="routebtn" value="route" /> -->5
<div id="map-canvas"></div>Advertisement
Answer
The markers locations are in the directions property of the directionsDisplay. To retrieve them when the route changes, add an event listener to the directionsDisplay for the directions_changed event, parse the directions object returned for the start and end locations of the route. For your route, with only a single leg, they will be:
JavaScript
1
3
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directionsDisplay.getDirections().routes[0].legs[0].start_location;2
directionsDisplay.getDirections().routes[0].legs[0].end_location;3
To put them in a <input> field on the page:
JavaScript
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google.maps.event.addListener(directionsDisplay, 'directions_changed', function() {2
document.getElementById("startlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].start_location.toUrlValue(6);3
document.getElementById("endlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].end_location.toUrlValue(6);4
});5
code snippet:
JavaScript
1
43
43
1
function mapLocation() {2
var directionsDisplay;3
var directionsService = new google.maps.DirectionsService();4
var map;5
6
function initialize() {7
directionsDisplay = new google.maps.DirectionsRenderer({8
draggable: true9
});10
var city = new google.maps.LatLng(41.015137, 28.979530);11
var mapOptions = {12
zoom: 7,13
center: city14
};15
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);16
directionsDisplay.setMap(map);17
google.maps.event.addListener(directionsDisplay, 'directions_changed', function() {18
document.getElementById("startlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].start_location.toUrlValue(6);19
document.getElementById("endlatlng").value = directionsDisplay.getDirections().routes[0].legs[0].end_location.toUrlValue(6);20
});21
calcRoute();22
}23
24
function calcRoute() {25
var start = new google.maps.LatLng(41.01524, 28.975994);26
var end = new google.maps.LatLng(41.013232, 28.978676);27
var request = {28
origin: start,29
destination: end,30
travelMode: google.maps.TravelMode.DRIVING31
};32
directionsService.route(request, function(response, status) {33
if (status == google.maps.DirectionsStatus.OK) {34
directionsDisplay.setDirections(response);35
directionsDisplay.setMap(map);36
} else {37
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);38
}39
});40
}41
google.maps.event.addDomListener(window, 'load', initialize);42
}43
mapLocation();JavaScript
1
8
1
html,2
body,3
#map-canvas {4
height: 90%;5
width: 100%;6
margin: 0px;7
padding: 0px8
}JavaScript
1
7
1
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>2
3
<body>4
<input type="text" id="startlatlng" />5
<input type="text" id="endlatlng" />6
<!-- <input type="button" id="routebtn" value="route" /> -->7
<div id="map-canvas"></div>