Javascript 如何使用 google maps api 反向地理编码？
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时间：2020-08-24 07:36:03 来源:igfitidea点击:
How can I reverse geocode with google maps api?
提问by hairynuggets
I am using the following code to display google maps on my website with autocomplete functionality.
我正在使用以下代码在我的网站上显示具有自动完成功能的谷歌地图。
I would like to be able to reverse geocode using the longitude and latitude and echo the address on my page.
我希望能够使用经度和纬度反向地理编码并在我的页面上回显地址。
How is this implemented am I on the right path?
我在正确的道路上是如何实施的？
<script type="text/javascript">
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(-33.8688, 151.2195),
zoom: 17,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
var input = document.getElementById('searchTextField');
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);
var infowindow = new google.maps.InfoWindow();
var marker = new google.maps.Marker({
map: map,
draggable: true
});
google.maps.event.addListener(autocomplete, 'place_changed', function() {
infowindow.close();
var place = autocomplete.getPlace();
if (place.geometry.viewport) {
map.fitBounds(place.geometry.viewport);
} else {
map.setCenter(place.geometry.location);
map.setZoom(17); // Why 17? Because it looks good.
}
google.maps.event.addListener(marker, "dragend", function (event) {
var point = marker.getPosition();
map.panTo(point);
document.getElementById("latitude").value = point.lat();
document.getElementById("longitude").value = point.lng();
});
var image = new google.maps.MarkerImage(
place.icon,
new google.maps.Size(71, 71),
new google.maps.Point(0, 0),
new google.maps.Point(17, 34),
new google.maps.Size(35, 35));
marker.setIcon(image);
marker.setPosition(place.geometry.location);
var address = '';
if (place.address_components) {
address = [(place.address_components[0] &&
place.address_components[0].short_name || ''),
(place.address_components[1] &&
place.address_components[1].short_name || ''),
(place.address_components[2] &&
place.address_components[2].short_name || '')
].join(' ');
}
infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
infowindow.open(map, marker);
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
回答by Biranchi
Try this for Google Reverse Geocoding:
试试这个谷歌反向地理编码：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Reverse Geocoding</title>
<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;
}
#floating-panel {
position: absolute;
top: 10px;
left: 25%;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto','sans-serif';
line-height: 30px;
padding-left: 10px;
}
#floating-panel {
position: absolute;
top: 5px;
left: 50%;
margin-left: -180px;
width: 350px;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
}
#latlng {
width: 225px;
}
</style>
</head>
<body>
<div id="floating-panel">
<input id="latlng" type="text" value="40.714224,-73.961452">
<input id="submit" type="button" value="Reverse Geocode">
</div>
<div id="map"></div>
<script>
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 8,
center: {lat: 40.731, lng: -73.997}
});
var geocoder = new google.maps.Geocoder;
var infowindow = new google.maps.InfoWindow;
document.getElementById('submit').addEventListener('click', function() {
geocodeLatLng(geocoder, map, infowindow);
});
}
function geocodeLatLng(geocoder, map, infowindow) {
var input = document.getElementById('latlng').value;
var latlngStr = input.split(',', 2);
var latlng = {lat: parseFloat(latlngStr[0]), lng: parseFloat(latlngStr[1])};
geocoder.geocode({'location': latlng}, function(results, status) {
if (status === 'OK') {
if (results[0]) {
map.setZoom(11);
var marker = new google.maps.Marker({
position: latlng,
map: map
});
infowindow.setContent(results[0].formatted_address);
infowindow.open(map, marker);
} else {
window.alert('No results found');
}
} else {
window.alert('Geocoder failed due to: ' + status);
}
});
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
