Geographic Information Systems Asked by Prince Kadiwar on November 1, 2021
I am new to MapBox and this may be a very simple solution, what I am trying to Achieve is to get the Coordinates of the marker which pops up when I search for Any Address/Location in the Search box. The Marker is a draggable, and it should fetch the updated coordinates when moved.
Please have a look at the below code:
<html>
<head>
<meta charset="utf-8" />
<title>Locate the user</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.11.1/mapbox-gl.js"></script>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.11.1/mapbox-gl.css" rel="stylesheet" />
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 50%; }
</style>
</head>
<body>
<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.5.1/mapbox-gl-geocoder.min.js"></script>
<link
rel="stylesheet"
href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.5.1/mapbox-gl-geocoder.css"
type="text/css"
/>
<!-- Promise polyfill script required to use Mapbox GL Geocoder in IE 11 -->
<script src="https://cdn.jsdelivr.net/npm/es6-promise@4/dist/es6-promise.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/es6-promise@4/dist/es6-promise.auto.min.js"></script>
<style>
.coordinates {
background: rgba(0, 0, 0, 0.5);
color: #fff;
position: absolute;
bottom: 40px;
left: 10px;
padding: 5px 10px;
margin: 0;
font-size: 11px;
line-height: 18px;
border-radius: 3px;
display: none;
}
</style>
<div id="map"></div>
<pre id="coordinates" class="coordinates"></pre>
<script>
mapboxgl.accessToken = 'pk......';
var map = new mapboxgl.Map({
container: 'map', // container id
style: 'mapbox://styles/mapbox/streets-v11',
center: [-96, 37.8], // starting position
zoom: 2 // starting zoom
});
map.addControl(new mapboxgl.NavigationControl());
var geocoder = new MapboxGeocoder({
accessToken: mapboxgl.accessToken,
marker: {
color: 'orange',
draggable: true
},
mapboxgl: mapboxgl
});
map.addControl(geocoder);
</script>
</body>
</html>
Please add you Mapboxgl AccessToken.
When you select a result from the search, as it places the marker on the map, the Geocoder will also fire a 'result' event, https://github.com/mapbox/mapbox-gl-geocoder/blob/master/API.md#on which you can listen to with:
geocoder.on('result', function(result) {
console.log(result)
})
I don't think detecting when this is dragged is officially supported yet, but you could probably hack a solution with:
geocoder.mapMarker.on('dragend', function (e) {
console.log(e)
})
You might need to register the listener only after the result event is triggered, by placing it inside the previous callback function.
Answered by AndrewHarvey on November 1, 2021
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