问题描述
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例如，如果我们有这些坐标集
\"latitude\": 48.858844300000001,\"longitude\": 2.2943506,
解决方法
免费的Google Geocoding API通过HTTP REST API提供此服务。请注意，API受使用和速率限制，但是您可以为无限制访问付费。
尝试此链接以查看输出示例（这在json中，输出在XML中也可用）
https://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=true
, 另外的选择：
从http://download.geonames.org/export/dump/下载城市数据库
将每个城市作为纬度/经度->城市映射添加到空间索引（例如R-Tree）（某些DB也具有此功能）
使用最近邻搜索来查找任何给定点的最近城市
优点：
不依赖于外部服务器是否可用
非常快（每秒轻松进行数千次查询）
缺点：
不会自动更新
如果要区分最近的城市在几十英里之外的情况，则需要额外的代码
可能在两极和国际日期变更线附近产生奇怪的结果（尽管这些地方没有任何城市
, 你需要
geopy
pip install geopy
from geopy.geocoders import Nominatim
geolocator = Nominatim()
location = geolocator.reverse(\"48.8588443,2.2943506\")
print(location.address)
print (location.raw)
{\'place_id\': \'24066644\',\'osm_id\': \'2387784956\',\'lat\': \'41.442115\',\'lon\': \'-8.2939909\',\'boundingbox\': [\'41.442015\',\'41.442215\',\'-8.2940909\',\'-8.2938909\'],\'address\': {\'country\': \'Portugal\',\'suburb\': \'Oliveira do Castelo\',\'house_number\': \'99\',\'city_district\': \'Oliveira do Castelo\',\'country_code\': \'pt\',\'city\': \'Oliveira,São Paio e São Sebastião\',\'state\': \'Norte\',\'state_district\': \'Ave\',\'pedestrian\': \'Rua Doutor Avelino Germano\',\'postcode\': \'4800-443\',\'county\': \'Guimarães\'},\'osm_type\': \'node\',\'display_name\': \'99,Rua Doutor Avelino Germano,Oliveira do Castelo,Oliveira,São Paio e São Sebastião,Guimarães,Braga,Ave,Norte,4800-443,Portugal\',\'licence\': \'Data © OpenStreetMap contributors,ODbL 1.0. http://www.openstreetmap.org/copyright\'}
import geocoder
g = geocoder.osm([53.5343609,-113.5065084],method=\'reverse\')
print g.json[\'city\'] # Prints Edmonton
g = geocoder.osm(\'Edmonton,Canada\')
print g.json[\'lat\'],g.json[\'lng\'] # Prints 53.5343609,-113.5065084
<script src=\"//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js\"></script>
<script type=\"text/javascript\" src=\"http://maps.googleapis.com/maps/api/js?key=<YOURGOOGLEKEY>&sensor=false&v=3&libraries=geometry\"></script>
//CHECK IF BROWSER HAS HTML5 GEO LOCATION
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
//GET USER CURRENT LOCATION
var locCurrent = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
//CHECK IF THE USERS GEOLOCATION IS IN AUSTRALIA
var geocoder = new google.maps.Geocoder();
geocoder.geocode({ \'latLng\': locCurrent },function (results,status) {
var locItemCount = results.length;
var locCountryNameCount = locItemCount - 1;
var locCountryName = results[locCountryNameCount].formatted_address;
if (locCountryName == \"Australia\") {
//SET COOKIE FOR GIVING
jQuery.cookie(\'locCountry\',locCountryName,{ expires: 30,path: \'/\' });
}
});
}
}
reverse_geocoder
public function get_location($latitude=\'\',$longitude=\'\')
{
$geolocation = $latitude.\',\'.$longitude;
$request = \'http://maps.googleapis.com/maps/api/geocode/json?latlng=\'.$geolocation.\'&sensor=false\';
$file_contents = file_get_contents($request);
$json_decode = json_decode($file_contents);
if(isset($json_decode->results[0])) {
$response = array();
foreach($json_decode->results[0]->address_components as $addressComponet) {
if(in_array(\'political\',$addressComponet->types)) {
$response[] = $addressComponet->long_name;
}
}
if(isset($response[0])){ $first = $response[0]; } else { $first = \'null\'; }
if(isset($response[1])){ $second = $response[1]; } else { $second = \'null\'; }
if(isset($response[2])){ $third = $response[2]; } else { $third = \'null\'; }
if(isset($response[3])){ $fourth = $response[3]; } else { $fourth = \'null\'; }
if(isset($response[4])){ $fifth = $response[4]; } else { $fifth = \'null\'; }
$loc[\'address\']=\'\'; $loc[\'city\']=\'\'; $loc[\'state\']=\'\'; $loc[\'country\']=\'\';
if( $first != \'null\' && $second != \'null\' && $third != \'null\' && $fourth != \'null\' && $fifth != \'null\' ) {
$loc[\'address\'] = $first;
$loc[\'city\'] = $second;
$loc[\'state\'] = $fourth;
$loc[\'country\'] = $fifth;
}
else if ( $first != \'null\' && $second != \'null\' && $third != \'null\' && $fourth != \'null\' && $fifth == \'null\' ) {
$loc[\'address\'] = $first;
$loc[\'city\'] = $second;
$loc[\'state\'] = $third;
$loc[\'country\'] = $fourth;
}
else if ( $first != \'null\' && $second != \'null\' && $third != \'null\' && $fourth == \'null\' && $fifth == \'null\' ) {
$loc[\'city\'] = $first;
$loc[\'state\'] = $second;
$loc[\'country\'] = $third;
}
else if ( $first != \'null\' && $second != \'null\' && $third == \'null\' && $fourth == \'null\' && $fifth == \'null\' ) {
$loc[\'state\'] = $first;
$loc[\'country\'] = $second;
}
else if ( $first != \'null\' && $second == \'null\' && $third == \'null\' && $fourth == \'null\' && $fifth == \'null\' ) {
$loc[\'country\'] = $first;
}
}
return $loc;
}
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position){
initialize(position.coords.latitude,position.coords.longitude);
});
}
function initialize(lat,lng) {
//directionsDisplay = new google.maps.DirectionsRenderer(rendererOptions);
//directionsService = new google.maps.DirectionsService();
var latlng = new google.maps.LatLng(lat,lng);
//alert(latlng);
getLocation(latlng);
}
function getLocation(latlng){
var geocoder = new google.maps.Geocoder();
geocoder.geocode({\'latLng\': latlng},function(results,status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[0]) {
var loc = getCountry(results);
alert(\"location is::\"+loc);
}
}
});
}
function getCountry(results)
{
for (var i = 0; i < results[0].address_components.length; i++)
{
var shortname = results[0].address_components[i].short_name;
var longname = results[0].address_components[i].long_name;
var type = results[0].address_components[i].types;
if (type.indexOf(\"country\") != -1)
{
if (!isNullOrWhitespace(shortname))
{
return shortname;
}
else
{
return longname;
}
}
}
}
function isNullOrWhitespace(text) {
if (text == null) {
return true;
}
return text.replace(/\\s/gi,\'\').length < 1;
}
function getCityAndCountry(location) {
var components = {};
for(var i = 0; i < location.address_components.length; i++) {
components[location.address_components[i].types[0]] = location.address_components[i].long_name;
}
if(!components[\'country\']) {
console.warn(\'Couldn\\\'t extract country\');
return false;
}
if(components[\'locality\']) {
return [components[\'locality\'],components[\'country\']];
} else if(components[\'administrative_area_level_1\']) {
return [components[\'administrative_area_level_1\'],components[\'country\']];
} else {
console.warn(\'Couldn\\\'t extract city\');
return false;
}
}