I get the lat&lng info of a certain place ,and I want to get the city or province name where this place lies,how can I do that?
for example ,with this lat&lng: Point(39.904667 116.408198) in beijing China,I want to get beijing.
Does google map has any api can do that?
Not sure about Google Maps, but geonames (http://www.geonames.org/) might have what you need, especially this one: http://www.geonames.org/export/web-services.html#countrysubdiv
What you describe is called Reverse Geocoding. Google provides two APIs for that: A JavaScript API, and a Web Service API.
Example using the web service:
http://maps.google.com/maps/api/geocode/json?latlng=39.904667,116.408198&sensor=false
Response (using JSON, but can also return XML):
{
"status": "OK",
"results": [ {
"types": [ "street_address" ],
"formatted_address": "2号 Zhengyi Rd, Dongcheng, Beijing, China",
"address_components": [ {
"long_name": "2号",
"short_name": "2号",
"types": [ "street_number" ]
}, {
"long_name": "Zhengyi Rd",
"short_name": "Zhengyi Rd",
"types": [ "route" ]
}, {
"long_name": "Dongcheng",
"short_name": "Dongcheng",
"types": [ "sublocality", "political" ]
}, {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "locality", "political" ]
}, {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "administrative_area_level_1", "political" ]
}, {
"long_name": "China",
"short_name": "CN",
"types": [ "country", "political" ]
} ],
"geometry": {
"location": {
"lat": 39.9042110,
"lng": 116.4074130
},
"location_type": "ROOFTOP",
"viewport": {
"southwest": {
"lat": 39.9010634,
"lng": 116.4042654
},
"northeast": {
"lat": 39.9073586,
"lng": 116.4105606
}
}
}
}, {
"types": [ "sublocality", "political" ],
"formatted_address": "Dongcheng, Beijing, China",
"address_components": [ {
"long_name": "Dongcheng",
"short_name": "Dongcheng",
"types": [ "sublocality", "political" ]
}, {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "locality", "political" ]
}, {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "administrative_area_level_1", "political" ]
}, {
"long_name": "China",
"short_name": "CN",
"types": [ "country", "political" ]
} ],
"geometry": {
"location": {
"lat": 39.9284190,
"lng": 116.4161900
},
"location_type": "APPROXIMATE",
"viewport": {
"southwest": {
"lat": 39.9000758,
"lng": 116.3868896
},
"northeast": {
"lat": 39.9754256,
"lng": 116.4471843
}
},
"bounds": {
"southwest": {
"lat": 39.9000758,
"lng": 116.3868896
},
"northeast": {
"lat": 39.9754256,
"lng": 116.4471843
}
}
}
}, {
"types": [ "administrative_area_level_1", "political" ],
"formatted_address": "Beijing, China",
"address_components": [ {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "administrative_area_level_1", "political" ]
}, {
"long_name": "China",
"short_name": "CN",
"types": [ "country", "political" ]
} ],
"geometry": {
"location": {
"lat": 39.9046670,
"lng": 116.4081980
},
"location_type": "APPROXIMATE",
"viewport": {
"southwest": {
"lat": 39.4432527,
"lng": 115.4203742
},
"northeast": {
"lat": 41.0608685,
"lng": 117.5055691
}
},
"bounds": {
"southwest": {
"lat": 39.4432527,
"lng": 115.4203742
},
"northeast": {
"lat": 41.0608685,
"lng": 117.5055691
}
}
}
}, {
"types": [ "locality", "political" ],
"formatted_address": "Beijing, China",
"address_components": [ {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "locality", "political" ]
}, {
"long_name": "Beijing",
"short_name": "Beijing",
"types": [ "administrative_area_level_1", "political" ]
}, {
"long_name": "China",
"short_name": "CN",
"types": [ "country", "political" ]
} ],
"geometry": {
"location": {
"lat": 39.9046670,
"lng": 116.4081980
},
"location_type": "APPROXIMATE",
"viewport": {
"southwest": {
"lat": 39.6612714,
"lng": 116.0119343
},
"northeast": {
"lat": 40.2164962,
"lng": 116.7829835
}
},
"bounds": {
"southwest": {
"lat": 39.6612714,
"lng": 116.0119343
},
"northeast": {
"lat": 40.2164962,
"lng": 116.7829835
}
}
}
}, {
"types": [ "country", "political" ],
"formatted_address": "China",
"address_components": [ {
"long_name": "China",
"short_name": "CN",
"types": [ "country", "political" ]
} ],
"geometry": {
"location": {
"lat": 35.8616600,
"lng": 104.1953970
},
"location_type": "APPROXIMATE",
"viewport": {
"southwest": {
"lat": 17.9996000,
"lng": 73.4994137
},
"northeast": {
"lat": 53.5609740,
"lng": 134.7728100
}
},
"bounds": {
"southwest": {
"lat": 17.9996000,
"lng": 73.4994137
},
"northeast": {
"lat": 53.5609740,
"lng": 134.7728100
}
}
}
} ]
}
And this is an example using the JavaScript API:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps Reverse Geocoding</title>
<script src="http://maps.google.com/maps/api/js?sensor=false"
type="text/javascript"></script>
</head>
<body>
<div id="map" style="width: 400px; height: 300px;"></div>
<script type="text/javascript">
var map = new google.maps.Map(document.getElementById('map'), {
mapTypeId: google.maps.MapTypeId.ROADMAP,
zoom: 12
});
var infowindow = new google.maps.InfoWindow();
var geocoder = new google.maps.Geocoder();
geocoder.geocode({
'latLng': new google.maps.LatLng(39.904667, 116.408198)
},
function(results, status) {
if(status == google.maps.GeocoderStatus.OK) {
var marker = new google.maps.Marker({
position: results[0].geometry.location,
map: map
});
map.setCenter(results[0].geometry.location);
infowindow.setContent(results[1].formatted_address);
infowindow.open(map, marker);
}
});
</script>
</body>
</html>
Screenshot:
