如何从 Google 地理编码 API 中仅获取 administrative_area_level_2?

How to get only administrative_area_level_2 from Google Geocoding API?

我试图从 Google 地理定位 API 结果中仅获取县名。不幸的是,结果并不总是在同一个地方,所以我需要通过一个识别键来获取它 administrative_area_level_2

这是我的电话:

$.getJSON( {
    url  : 'http://maps.googleapis.com/maps/api/geocode/json?latlng=' + position.coords.latitude + ',' + position.coords.longitude + '&sensor=true',
    data : {
        sensor  : false
    },
    success : function( data, textStatus ) {
        var county = data.results[0].address_components[4].long_name;
        alert('County: ' + county);
    }
});

这适用于我所在的县,但不适用于其他县,因为 address_components[4] 并不总是该县。但是,我确实注意到该县始终与 administrative_area_level_2

相关联

这是一个示例响应:

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "Edge of Everglades Trail",
               "short_name" : "Edge of Everglades Trail",
               "types" : [ "route" ]
            },
            {
               "long_name" : "Homestead",
               "short_name" : "Homestead",
               "types" : [ "locality", "political" ]
            },
            {
               "long_name" : "Miami-Dade County",
               "short_name" : "Miami-Dade County",
               "types" : [ "administrative_area_level_2", "political" ]
            },
            {
               "long_name" : "Florida",
               "short_name" : "FL",
               "types" : [ "administrative_area_level_1", "political" ]
            },
            {
               "long_name" : "United States",
               "short_name" : "US",
               "types" : [ "country", "political" ]
            },
            {
               "long_name" : "33031",
               "short_name" : "33031",
               "types" : [ "postal_code" ]
            }
         ],
... 

我将如何获得与 administrative_area_level_2 类型关联的 "long_name"?

为了从地址组件数组中获取 administrative_area_level_2,您可以使用 Array.prototype.filter() and Array.prototype.includes() 函数。

var filtered_array = data.results[0].address_components.filter(function(address_component){
    return address_component.types.includes("administrative_area_level_2");
}); 
var county = filtered_array.length ? filtered_array[0].long_name: "";

您也可以使用反向地理编码直接搜索 administrative_area_level_2

$.getJSON( {
    url  : 'http://maps.googleapis.com/maps/api/geocode/json?latlng=' + position.coords.latitude + ',' + position.coords.longitude + '&result_type=administrative_area_level_2',
    data : {
        sensor  : false
    },
    success : function( data, textStatus ) {
        var filtered_array = data.results[0].address_components.filter(function(address_component){
            return address_component.types.includes("administrative_area_level_2");
        }); 
        var county = filtered_array.length ? filtered_array[0].long_name: "";
        alert('County: ' + county);
    }
});

希望对您有所帮助!