Javascript 在 Google Maps API v3 中以国家/地区为中心
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Center on a country by name in Google Maps API v3
提问by David
Would someone tell me how to center on a country by name on the Google Maps API v3? I know how to do it in v2, but need to do it in v3.
有人会告诉我如何在 Google Maps API v3 上按名称以国家/地区为中心吗？我知道如何在 v2 中执行此操作，但需要在 v3 中执行此操作。
回答by kzhen
You could use Geocoding to lookup the Lat/Lng of the country. Take a look at this samplefrom Google.
您可以使用地理编码来查找国家/地区的纬度/经度。看看来自 Google 的这个示例。
Basically you need to do something like this:
基本上你需要做这样的事情：
var country = "Germany";
var geocoder;
geocoder.geocode( {'address' : country}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
}
});
In your initialize function you'll need to set the value of the geocoder object, like this:
在您的初始化函数中，您需要设置地理编码器对象的值，如下所示：
geocoder = new google.maps.Geocoder();
You'd need to workout what an appropriate zoom level would be, and then set that after you have centered the map.
您需要练习适当的缩放级别，然后在将地图居中后进行设置。
回答by Ashish Gupta
This code working for me:
这段代码对我有用：
let geocoder = new google.maps.Geocoder();
let location = "England";
geocoder.geocode({ 'address': location }, function(results, status){
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
} else {
alert("Could not find location: " + location);
}
});
回答by Jose Vega
The only way I know how to do it would be by having a list of the countries and their respective Lat and Lng, with that information known you could use the following code.
我知道如何做到这一点的唯一方法是列出国家及其各自的 Lat 和 Lng，知道这些信息后，您可以使用以下代码。
var myLatlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 8,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
Out of curiosity, how would you do it in v2?
出于好奇，你会如何在 v2 中做到这一点？
