閱讀所有關於如何在谷歌地圖API v3文檔資料,在這裏得到了用戶的位置: http://code.google.com/apis/maps/documentation/javascript/basics.html#DetectingUserLocation
如果源是GPS傳感器或東西沒關係否則 - 你仍然以同樣的方式得到它。在我看來,那裏的文檔或多或少地回答了所有四個問題。
下面是從該網頁相關的示例代碼:
// Note that using Google Gears requires loading the Javascript
// at http://code.google.com/apis/gears/gears_init.js
var initialLocation;
var siberia = new google.maps.LatLng(60, 105);
var newyork = new google.maps.LatLng(40.69847032728747, -73.9514422416687);
var browserSupportFlag = new Boolean();
function initialize() {
var myOptions = {
zoom: 6,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
// Try W3C Geolocation (Preferred)
if(navigator.geolocation) {
browserSupportFlag = true;
navigator.geolocation.getCurrentPosition(function(position) {
initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
map.setCenter(initialLocation);
}, function() {
handleNoGeolocation(browserSupportFlag);
});
// Try Google Gears Geolocation
} else if (google.gears) {
browserSupportFlag = true;
var geo = google.gears.factory.create('beta.geolocation');
geo.getCurrentPosition(function(position) {
initialLocation = new google.maps.LatLng(position.latitude,position.longitude);
map.setCenter(initialLocation);
}, function() {
handleNoGeoLocation(browserSupportFlag);
});
// Browser doesn't support Geolocation
} else {
browserSupportFlag = false;
handleNoGeolocation(browserSupportFlag);
}
function handleNoGeolocation(errorFlag) {
if (errorFlag == true) {
alert("Geolocation service failed.");
initialLocation = newyork;
} else {
alert("Your browser doesn't support geolocation. We've placed you in Siberia.");
initialLocation = siberia;
}
map.setCenter(initialLocation);
}
}
您可能會發現這個問題的一個很好的起點,一些這樣的:http://stackoverflow.com/questions/221592/geolocation-api-on -the-iphone – 2011-06-05 21:49:05