Javascript 谷歌地图获取具有城市名称的纬度和经度？
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Google maps get latitude and longitude having city name?
提问by lisovaccaro
I want to get latitude and longitude of a city by providing the API with the city name. It should work for most cities regardless how the user inputs the city.
我想通过为 API 提供城市名称来获取城市的纬度和经度。无论用户如何输入城市，它都应该适用于大多数城市。
For example:
例如：
City can be 'miami, US' or city can be 'miami, united states'
城市可以是“迈阿密，美国”或城市可以是“迈阿密，美国”
How do I print its latitude?
我如何打印它的纬度？
回答by Zakaria
You can find the code jsfiddled here : http://jsfiddle.net/YphZw/or below :
您可以在此处找到 jsfiddled 代码：http: //jsfiddle.net/YphZw/或以下：
$("#btn").click(function(){
var geocoder = new google.maps.Geocoder();
geocoder.geocode( { 'address': 'miami, us'}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
alert("location : " + results[0].geometry.location.lat() + " " +results[0].geometry.location.lng());
} else {
alert("Something got wrong " + status);
}
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<html>
<head>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
</head>
<body>
<input id="btn" type="button" value="search for miami coordinates" />
</body>
</html>If you want more examples for the Javascript API, try this link : https://developers.google.com/maps/documentation/javascript/examples/
如果您想要更多 Javascript API 示例，请尝试此链接：https: //developers.google.com/maps/documentation/javascript/examples/
The code I wrote is inspired from the geocoding-simplesample.
我编写的代码灵感来自地理编码简单示例。
Regards.
问候。
EDIT 1:
编辑 1：
You can achieve it using an non-official PHP library. Check this example : http://www.bradwedell.com/phpgooglemapapi/demos/geocoding.php(The code is at the bottom=
您可以使用非官方 PHP 库来实现它。检查这个例子：http: //www.bradwedell.com/phpgooglemapapi/demos/geocoding.php（代码在底部=
回答by debracey
You can use Google's geocoding service, e.g.,
您可以使用 Google 的地理编码服务，例如，
http://maps.googleapis.com/maps/api/geocode/xml?address=Miami+FL&sensor=false
http://maps.googleapis.com/maps/api/geocode/xml?address=Miami+FL&sensor=false
That gives you back georeferenced data in a variety of formats (JSON, XML, etc). In any event, the location is definitely in the returned data block.
这为您提供了各种格式（JSON、XML 等）的地理参考数据。无论如何，该位置肯定在返回的数据块中。
The API docs are at:
API 文档位于：
回答by corysimmons
Update per comment below:Doesn't work after July 2018.
根据以下评论更新：2018 年 7 月后不起作用。
This seems needlessly complicated. Here's an example "nearby events" map. It will take City, States, convert them to latLngcoords, and put markers on a map:
这似乎不必要地复杂。这是“附近事件”地图的示例。这将需要City, States，将它们转换为latLng坐标，然后在地图上放置标记：
// Nearby Events with Google Maps
window.nearbyEventsMap = () => {
const centerOfUS = {
lat: 37.09024,
lng: -95.712891
}
// Create a map object and specify the DOM element for display.
const map = new google.maps.Map(document.querySelector('#nearby_events_map'), {
center: centerOfUS,
scrollwheel: false,
zoom: 4
})
// Create a marker and set its position.
const geocoder = new google.maps.Geocoder()
// Filter out duplicate cityStates
let cityStates = {}
document.querySelectorAll('.nearby_event_city_state').forEach(event => {
cityStates[event] = event.innerText
})
// `cityState` is in the format of "City, State". It's not picky about state being a word or the abbreviation.
for (const cityState in cityStates) {
const location = cityStates[cityState]
geocoder.geocode({
address: location
}, function (results, status) {
if (status === 'OK') {
const result = results[0].geometry.location
const lat = result.lat()
const lng = result.lng()
const latLng = {
lat,
lng
}
return new google.maps.Marker({
map: map,
position: latLng
})
}
})
}
}
// /Nearby Events with Google Maps
Make sure to include your <script>tags.
确保包含您的<script>标签。
<script src="/dist/js/main.js"></script>
<!-- We're loading this after the main.js script so the callback from main.js will be available to it. -->
<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=nearbyEventsMap"></script>
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