使用地理位置获取城市名称

2020/11/16 04:22 · javascript ·  · 0评论

我设法使用基于HTML的地理位置来获取用户的纬度和经度。

//Check if browser supports W3C Geolocation API
if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(successFunction, errorFunction);
} 
//Get latitude and longitude;
function successFunction(position) {
    var lat = position.coords.latitude;
    var long = position.coords.longitude;
}

我想显示城市名称,似乎获得城市名称的唯一方法是使用反向地理位置API。我阅读了Google的反向地理位置文档,但是我不知道如何在我的网站上获得输出。

我不知道该如何使用:"http://maps.googleapis.com/maps/api/geocode/json?latlng='+lat+','+long+'&sensor=true"在页面上显示城市名称。

我该如何实现?

您将使用Google API执行类似的操作。

请注意,您必须包括google maps库才能起作用。Google地理编码器会返回很多地址组成部分,因此您必须做出有根据的猜测,以了解哪个城市将拥有该城市。

“ administrative_area_level_1”通常是您要寻找的,但有时所在地是您追求的城市。

无论如何-有关Google响应类型的更多详细信息,请参见此处此处

下面是应该完成此操作的代码:

<!DOCTYPE html> 
<html> 
<head> 
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/> 
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/> 
<title>Reverse Geocoding</title> 

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script> 
<script type="text/javascript"> 
  var geocoder;

  if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(successFunction, errorFunction);
} 
//Get the latitude and the longitude;
function successFunction(position) {
    var lat = position.coords.latitude;
    var lng = position.coords.longitude;
    codeLatLng(lat, lng)
}

function errorFunction(){
    alert("Geocoder failed");
}

  function initialize() {
    geocoder = new google.maps.Geocoder();



  }

  function codeLatLng(lat, lng) {

    var latlng = new google.maps.LatLng(lat, lng);
    geocoder.geocode({'latLng': latlng}, function(results, status) {
      if (status == google.maps.GeocoderStatus.OK) {
      console.log(results)
        if (results[1]) {
         //formatted address
         alert(results[0].formatted_address)
        //find country name
             for (var i=0; i<results[0].address_components.length; i++) {
            for (var b=0;b<results[0].address_components[i].types.length;b++) {

            //there are different types that might hold a city admin_area_lvl_1 usually does in come cases looking for sublocality type will be more appropriate
                if (results[0].address_components[i].types[b] == "administrative_area_level_1") {
                    //this is the object you are looking for
                    city= results[0].address_components[i];
                    break;
                }
            }
        }
        //city data
        alert(city.short_name + " " + city.long_name)


        } else {
          alert("No results found");
        }
      } else {
        alert("Geocoder failed due to: " + status);
      }
    });
  }
</script> 
</head> 
<body onload="initialize()"> 

</body> 
</html> 
$.ajax({
  url: "https://geolocation-db.com/jsonp",
  jsonpCallback: "callback",
  dataType: "jsonp",
  success: function(location) {
    $('#country').html(location.country_name);
    $('#state').html(location.state);
    $('#city').html(location.city);
    $('#latitude').html(location.latitude);
    $('#longitude').html(location.longitude);
    $('#ip').html(location.IPv4);
  }
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>

<div>Country: <span id="country"></span></div>
  <div>State: <span id="state"></span></div>
    <div>City: <span id="city"></span></div>
      <div>Latitude: <span id="latitude"></span></div>
        <div>Longitude: <span id="longitude"></span></div>
          <div>IP: <span id="ip"></span></div>

使用html5地理位置需要用户许可。如果您不想这样做,请使用外部定位器,例如https://geolocation-db.com。支持IPv6。没有限制和无限的请求。

对于不使用jQuery的纯JavaScript示例,请查看答案。

另一种方法是使用我的服务http://ipinfo.io,该服务根据用户的当前IP地址返回城市,地区和国家/地区名称。这是一个简单的例子:

$.get("http://ipinfo.io", function(response) {
    console.log(response.city, response.country);
}, "jsonp");

这是一个更详细的JSFiddle示例,该示例还打印了完整的响应信息,因此您可以看到所有可用的详细信息:http : //jsfiddle.net/zK5FN/2/

您可以使用Google Maps Geocoding API获取城市,国家/地区,街道名称和其他地理数据的名称

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script type="text/javascript" src="https://code.jquery.com/jquery-2.2.3.js"></script>
</head>
<body>
    <script type="text/javascript">
        navigator.geolocation.getCurrentPosition(success, error);

        function success(position) {
            console.log(position.coords.latitude)
            console.log(position.coords.longitude)

            var GEOCODING = 'https://maps.googleapis.com/maps/api/geocode/json?latlng=' + position.coords.latitude + '%2C' + position.coords.longitude + '&language=en';

            $.getJSON(GEOCODING).done(function(location) {
                console.log(location)
            })

        }

        function error(err) {
            console.log(err)
        }
    </script>
</body>
</html>

并使用jQuery在页面上显示此数据

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script type="text/javascript" src="https://code.jquery.com/jquery-2.2.3.js"></script>
</head>
<body>

    <p>Country: <span id="country"></span></p>
    <p>State: <span id="state"></span></p>
    <p>City: <span id="city"></span></p>
    <p>Address: <span id="address"></span></p>

    <p>Latitude: <span id="latitude"></span></p>
    <p>Longitude: <span id="longitude"></span></p>

    <script type="text/javascript">
        navigator.geolocation.getCurrentPosition(success, error);

        function success(position) {

            var GEOCODING = 'https://maps.googleapis.com/maps/api/geocode/json?latlng=' + position.coords.latitude + '%2C' + position.coords.longitude + '&language=en';

            $.getJSON(GEOCODING).done(function(location) {
                $('#country').html(location.results[0].address_components[5].long_name);
                $('#state').html(location.results[0].address_components[4].long_name);
                $('#city').html(location.results[0].address_components[2].long_name);
                $('#address').html(location.results[0].formatted_address);
                $('#latitude').html(position.coords.latitude);
                $('#longitude').html(position.coords.longitude);
            })

        }

        function error(err) {
            console.log(err)
        }
    </script>
</body>
</html>

这是我的更新的工作版本,它将得到City / Town,看来json响应中的某些字段已修改。请参考先前针对此问题的答案。(感谢Michal和另外一个参考:Link

var geocoder;

if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(successFunction, errorFunction);
}
// Get the latitude and the longitude;
function successFunction(position) {
  var lat = position.coords.latitude;
  var lng = position.coords.longitude;
  codeLatLng(lat, lng);
}

function errorFunction() {
  alert("Geocoder failed");
}

function initialize() {
  geocoder = new google.maps.Geocoder();

}

function codeLatLng(lat, lng) {
  var latlng = new google.maps.LatLng(lat, lng);
  geocoder.geocode({latLng: latlng}, function(results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
      if (results[1]) {
        var arrAddress = results;
        console.log(results);
        $.each(arrAddress, function(i, address_component) {
          if (address_component.types[0] == "locality") {
            console.log("City: " + address_component.address_components[0].long_name);
            itemLocality = address_component.address_components[0].long_name;
          }
        });
      } else {
        alert("No results found");
      }
    } else {
      alert("Geocoder failed due to: " + status);
    }
  });
}

geolocator.js可以做到这一点。(我是作者)。

获取城市名称(受限地址)

geolocator.locateByIP(options, function (err, location) {
    console.log(location.address.city);
});

获取完整的地址信息

下面的示例将首先尝试使用HTML5 Geolocation API来获取确切的坐标。如果失败或被拒绝,它将回退到Geo-IP查找。获取坐标后,会将坐标反向地理编码到一个地址中。

var options = {
    enableHighAccuracy: true,
    fallbackToIP: true, // fallback to IP if Geolocation fails or rejected
    addressLookup: true
};
geolocator.locate(options, function (err, location) {
    console.log(location.address.city);
});

这在内部使用Google API(用于地址查找)。因此,在进行此调用之前,您应该使用Google API密钥配置geolocator。

geolocator.config({
    language: "en",
    google: {
        version: "3",
        key: "YOUR-GOOGLE-API-KEY"
    }
});

Geolocator支持地理位置(通过HTML5或IP查找),地理编码,地址查找(反向地理编码),距离和持续时间,时区信息以及更多功能...

经过一些搜索和拼凑了几个不同的解决方案以及我自己的东西之后,我想到了这个函数:

function parse_place(place)
{
    var location = [];

    for (var ac = 0; ac < place.address_components.length; ac++)
    {
        var component = place.address_components[ac];

        switch(component.types[0])
        {
            case 'locality':
                location['city'] = component.long_name;
                break;
            case 'administrative_area_level_1':
                location['state'] = component.long_name;
                break;
            case 'country':
                location['country'] = component.long_name;
                break;
        }
    };

    return location;
}

您可以使用https://ip-api.io/来获取城市名称。它支持IPv6。

作为奖励,它允许检查ip地址是tor节点,公共代理还是垃圾邮件发送者。

JavaScript代码:

$(document).ready(function () {
        $('#btnGetIpDetail').click(function () {
            if ($('#txtIP').val() == '') {
                alert('IP address is reqired');
                return false;
            }
            $.getJSON("http://ip-api.io/json/" + $('#txtIP').val(),
                 function (result) {
                     alert('City Name: ' + result.city)
                     console.log(result);
                 });
        });
    });

HTML代码

<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<div>
    <input type="text" id="txtIP" />
    <button id="btnGetIpDetail">Get Location of IP</button>
</div>

JSON输出

{
    "ip": "64.30.228.118",
    "country_code": "US",
    "country_name": "United States",
    "region_code": "FL",
    "region_name": "Florida",
    "city": "Fort Lauderdale",
    "zip_code": "33309",
    "time_zone": "America/New_York",
    "latitude": 26.1882,
    "longitude": -80.1711,
    "metro_code": 528,
    "suspicious_factors": {
        "is_proxy": false,
        "is_tor_node": false,
        "is_spam": false,
        "is_suspicious": false
    }
}

正如@PirateApp在他的评论中提到的那样,明确地反对Google的Maps API许可来按预期使用Maps API。

您有许多选择,包括下载Geoip数据库并在本地查询它,或使用第三方API服务(例如我的服务ipdata.co)

ipdata可为您提供来自任何IPv4或IPv6地址的地理位置,组织,货币,时区,呼叫代码,标志和Tor出口节点状态数据。

并具有10个全局端点的可扩展性,每个端点每秒能够处理10,000个以上的请求!

此答案使用的“测试” API密钥非常有限,仅用于测试几个调用。注册您自己的免费API密钥,每天最多可获得1500个开发请求。

$.get("https://api.ipdata.co?api-key=test", function(response) {
  $("#ip").html("IP: " + response.ip);
  $("#city").html(response.city + ", " + response.region);
  $("#response").html(JSON.stringify(response, null, 4));
}, "jsonp");
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h1><a href="https://ipdata.co">ipdata.co</a> - IP geolocation API</h1>

<div id="ip"></div>
<div id="city"></div>
<pre id="response"></pre>

小提琴 https://jsfiddle.net/ipdata/6wtf0q4g/922/

这是另一种解决方法。.向接受的答案中添加更多内容可能会更全面..当然,switch -case将使它看起来更优雅。

function parseGeoLocationResults(result) {
    const parsedResult = {}
    const {address_components} = result;

    for (var i = 0; i < address_components.length; i++) {
        for (var b = 0; b < address_components[i].types.length; b++) {
            if (address_components[i].types[b] == "street_number") {
                //this is the object you are looking for
                parsedResult.street_number = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "route") {
                //this is the object you are looking for
                parsedResult.street_name = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "sublocality_level_1") {
                //this is the object you are looking for
                parsedResult.sublocality_level_1 = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "sublocality_level_2") {
                //this is the object you are looking for
                parsedResult.sublocality_level_2 = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "sublocality_level_3") {
                //this is the object you are looking for
                parsedResult.sublocality_level_3 = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "neighborhood") {
                //this is the object you are looking for
                parsedResult.neighborhood = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "locality") {
                //this is the object you are looking for
                parsedResult.city = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "administrative_area_level_1") {
                //this is the object you are looking for
                parsedResult.state = address_components[i].long_name;
                break;
            }

            else if (address_components[i].types[b] == "postal_code") {
                //this is the object you are looking for
                parsedResult.zip = address_components[i].long_name;
                break;
            }
            else if (address_components[i].types[b] == "country") {
                //this is the object you are looking for
                parsedResult.country = address_components[i].long_name;
                break;
            }
        }
    }
    return parsedResult;
}

这是一个简单的函数,可以用来获取它。我使用axios发出API请求,但您可以使用其他任何东西。

async function getCountry(lat, long) {
  const { data: { results } } = await axios.get(`https://maps.googleapis.com/maps/api/geocode/json?latlng=${lat},${long}&key=${GOOGLE_API_KEY}`);
  const { address_components } = results[0];

  for (let i = 0; i < address_components.length; i++) {
    const { types, long_name } = address_components[i];

    if (types.indexOf("country") !== -1) return long_name;
  }
}
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