Gibt es eine Möglichkeit, einen Städtenamen von einem Breiten- und Längengradpunkt mithilfe der Google Maps-API für Javascript zu erhalten?
Wenn ja, könnte ich bitte ein Beispiel sehen?
Antworten:
Dies wird als Reverse Geocoding bezeichnet
Dokumentation von Google:
http://code.google.com/apis/maps/documentation/geocoding/#ReverseGeocoding .
Beispielaufruf für den Geocode-Webdienst von Google:
Hier ist ein vollständiges Beispiel:
<!DOCTYPE html>
<html>
<head>
<title>Geolocation API with Google Maps API</title>
<meta charset="UTF-8" />
</head>
<body>
<script>
function displayLocation(latitude,longitude){
var request = new XMLHttpRequest();
var method = 'GET';
var url = 'http://maps.googleapis.com/maps/api/geocode/json?latlng='+latitude+','+longitude+'&sensor=true';
var async = true;
request.open(method, url, async);
request.onreadystatechange = function(){
if(request.readyState == 4 && request.status == 200){
var data = JSON.parse(request.responseText);
var address = data.results[0];
document.write(address.formatted_address);
}
};
request.send();
};
var successCallback = function(position){
var x = position.coords.latitude;
var y = position.coords.longitude;
displayLocation(x,y);
};
var errorCallback = function(error){
var errorMessage = 'Unknown error';
switch(error.code) {
case 1:
errorMessage = 'Permission denied';
break;
case 2:
errorMessage = 'Position unavailable';
break;
case 3:
errorMessage = 'Timeout';
break;
}
document.write(errorMessage);
};
var options = {
enableHighAccuracy: true,
timeout: 1000,
maximumAge: 0
};
navigator.geolocation.getCurrentPosition(successCallback,errorCallback,options);
</script>
</body>
</html>
Hier ist eine moderne Lösung mit einem Versprechen:
function getAddress (latitude, longitude) {
return new Promise(function (resolve, reject) {
var request = new XMLHttpRequest();
var method = 'GET';
var url = 'http://maps.googleapis.com/maps/api/geocode/json?latlng=' + latitude + ',' + longitude + '&sensor=true';
var async = true;
request.open(method, url, async);
request.onreadystatechange = function () {
if (request.readyState == 4) {
if (request.status == 200) {
var data = JSON.parse(request.responseText);
var address = data.results[0];
resolve(address);
}
else {
reject(request.status);
}
}
};
request.send();
});
};
Und nenne es so:
getAddress(lat, lon).then(console.log).catch(console.error);Das Versprechen gibt das Adressobjekt in 'then' oder den Fehlerstatuscode in 'catch' zurück.
In node.js können wir das Node-Geocoder- npm-Modul verwenden, um die Adresse von lat, lng.,
geo.js
var NodeGeocoder = require('node-geocoder');
var options = {
provider: 'google',
httpAdapter: 'https', // Default
apiKey: ' ', // for Mapquest, OpenCage, Google Premier
formatter: 'json' // 'gpx', 'string', ...
};
var geocoder = NodeGeocoder(options);
geocoder.reverse({lat:28.5967439, lon:77.3285038}, function(err, res) {
console.log(res);
});
Ausgabe:
Knoten geo.js
[ { formattedAddress: 'C-85B, C Block, Sector 8, Noida, Uttar Pradesh 201301, India',
latitude: 28.5967439,
longitude: 77.3285038,
extra:
{ googlePlaceId: 'ChIJkTdx9vzkDDkRx6LVvtz1Rhk',
confidence: 1,
premise: 'C-85B',
subpremise: null,
neighborhood: 'C Block',
establishment: null },
administrativeLevels:
{ level2long: 'Gautam Buddh Nagar',
level2short: 'Gautam Buddh Nagar',
level1long: 'Uttar Pradesh',
level1short: 'UP' },
city: 'Noida',
country: 'India',
countryCode: 'IN',
zipcode: '201301',
provider: 'google' } ]
Hier ist das neueste Beispiel für den Geocode-Webdienst von Google
https://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&key=YOUR_API_KEY
Ändern YOUR_API_KEYSie einfach den API-Schlüssel, den Sie von der Google Geocoding-API erhalten
P / S: Die Geokodierungs-API befindet sich unter Orte NICHT Karten ;)
Der folgende Code funktioniert einwandfrei, um den Namen der Stadt abzurufen (mithilfe der Google Map Geo-API ):
HTML
<p><button onclick="getLocation()">Get My Location</button></p>
<p id="demo"></p>
<script src="http://maps.google.com/maps/api/js?key=YOUR_API_KEY"></script>SKRIPT
var x=document.getElementById("demo");
function getLocation(){
if (navigator.geolocation){
navigator.geolocation.getCurrentPosition(showPosition,showError);
}
else{
x.innerHTML="Geolocation is not supported by this browser.";
}
}
function showPosition(position){
lat=position.coords.latitude;
lon=position.coords.longitude;
displayLocation(lat,lon);
}
function showError(error){
switch(error.code){
case error.PERMISSION_DENIED:
x.innerHTML="User denied the request for Geolocation."
break;
case error.POSITION_UNAVAILABLE:
x.innerHTML="Location information is unavailable."
break;
case error.TIMEOUT:
x.innerHTML="The request to get user location timed out."
break;
case error.UNKNOWN_ERROR:
x.innerHTML="An unknown error occurred."
break;
}
}
function displayLocation(latitude,longitude){
var geocoder;
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(latitude, longitude);
geocoder.geocode(
{'latLng': latlng},
function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[0]) {
var add= results[0].formatted_address ;
var value=add.split(",");
count=value.length;
country=value[count-1];
state=value[count-2];
city=value[count-3];
x.innerHTML = "city name is: " + city;
}
else {
x.innerHTML = "address not found";
}
}
else {
x.innerHTML = "Geocoder failed due to: " + status;
}
}
);
}Gleich wie @Sanchit Gupta.
in diesem Teil
if (results[0]) {
var add= results[0].formatted_address ;
var value=add.split(",");
count=value.length;
country=value[count-1];
state=value[count-2];
city=value[count-3];
x.innerHTML = "city name is: " + city;
}trösten Sie einfach das Ergebnisarray
if (results[0]) {
console.log(results[0]);
// choose from console whatever you need.
var city = results[0].address_components[3].short_name;
x.innerHTML = "city name is: " + city;
}Es stehen viele Tools zur Verfügung
Andere kostenlose und kostenpflichtige Tools sind ebenfalls verfügbar
Sie können es mit reinem PHP und Google Geocode API tun
/*
*
* @param latlong (String) is Latitude and Longitude with , as separator for example "21.3724002,39.8016229"
**/
function getCityNameByLatitudeLongitude($latlong)
{
$APIKEY = "AIzaXXXXXXXXXXXXXXXXXXXXXXXXXXX"; // Replace this with your google maps api key
$googleMapsUrl = "https://maps.googleapis.com/maps/api/geocode/json?latlng=" . $latlong . "&language=ar&key=" . $APIKEY;
$response = file_get_contents($googleMapsUrl);
$response = json_decode($response, true);
$results = $response["results"];
$addressComponents = $results[0]["address_components"];
$cityName = "";
foreach ($addressComponents as $component) {
// echo $component;
$types = $component["types"];
if (in_array("locality", $types) && in_array("political", $types)) {
$cityName = $component["long_name"];
}
}
if ($cityName == "") {
echo "Failed to get CityName";
} else {
echo $cityName;
}
}