How to get a city's Lat,Alt on google maps API having only the name of the city
I'm trying to locate a city latitude and longitude only by having it's name.
I'm trying to use only the Gmaps API and avoiding the use of the webs开发者_运维问答ervice that google offers for geolocation.
after doing a search you can get coordinates trough place.Point.coordinates
example:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Maps API Sample</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false&key=ABQIAAAA1XbMiDxx_BTCY2_FkPh06RRaGTYH6UMl8mADNa0YKuWNNa8VNxQEerTAUcfkyrr6OwBovxn7TDAH5Q"></script>
<script type="text/javascript">
var map;
var geocoder;
function initialize() {
map = new GMap2(document.getElementById("map_canvas"));
map.setCenter(new GLatLng(34, 0), 1);
geocoder = new GClientGeocoder();
}
// addAddressToMap() is called when the geocoder returns an
// answer. It adds a marker to the map with an open info window
// showing the nicely formatted version of the address and the country code.
function addAddressToMap(response) {
map.clearOverlays();
if (!response || response.Status.code != 200) {
alert("Sorry, we were unable to geocode that address");
} else {
place = response.Placemark[0];
point = new GLatLng(place.Point.coordinates[1],
place.Point.coordinates[0]);
marker = new GMarker(point);
map.addOverlay(marker);
--> // here you get the coordinates of the founded point
marker.openInfoWindowHtml('<b>Coordinates:</b> ' + place.Point.coordinates);
}
}
// showLocation() is called when you click on the Search button
// in the form. It geocodes the address entered into the form
// and adds a marker to the map at that location.
function showLocation() {
var address = document.forms[0].q.value;
geocoder.getLocations(address, addAddressToMap);
}
// findLocation() is used to enter the sample addresses into the form.
function findLocation(address) {
document.forms[0].q.value = address;
showLocation();
}
</script>
</head>
<body onload="initialize()" onunload="GUnload()" style="font-family: Arial;border: 0 none;">
<!-- Creates a simple input box where you can enter an address
and a Search button that submits the form. //-->
<form action="#" onsubmit="showLocation(); return false;">
<p>
<b>Search cities:</b>
<input type="text" name="q" value="" class="address_input" size="40" />
<input type="submit" name="find" value="Search" />
</p>
</form>
<div id="map_canvas" style="width: 500px; height: 300px"></div>
</body>
</html>
加载中,请稍侯......
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