index.html
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<meta name=description content="">
<meta name=viewport content="width=device-width, initial-scale=1">
<title>Reverse geocoding</title>
<link rel="stylesheet" href="https://openlayers.org/en/v4.4.2/css/ol.css" type="text/css">
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL,fetch"></script>
<script src="https://openlayers.org/en/v4.4.2/build/ol.js"></script>
<style type="text/css">
#map {
height: 600px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<div>
<input id="lon" type="number" step="0.000001">
<input id="lat" type="number" step="0.000001">
<button id="reversegeocoding" type=button name="button">Reverse geocode manually</button>
<span id="address">
</span>
</div>
<script>
var map = new ol.Map({
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
target: 'map',
view: new ol.View({
center: [0, 0],
zoom: 2
})
});
function simpleReverseGeocoding(lon, lat) {
fetch('//nominatim.openstreetmap.org/reverse?format=json&lon=' + lon + '&lat=' + lat).then(function(response) {
return response.json();
}).then(function(json) {
document.getElementById('address').innerHTML = json.display_name;
})
}
map.on('click', function(e) {
var coordinate = ol.proj.toLonLat(e.coordinate).map(function(val) {
return val.toFixed(6);
});
var lon = document.getElementById('lon').value = coordinate[0];
var lat = document.getElementById('lat').value = coordinate[1];
simpleReverseGeocoding(lon, lat);
});
document.getElementById('reversegeocoding').addEventListener('click', function(e) {
if (document.getElementById('lon').value && document.getElementById('lat').value) {
simpleReverseGeocoding(document.getElementById('lon').value, document.getElementById('lat').value);
}
});
</script>
</body>
</html>