How to get maximum accuracy of user's current location

Question

I am using this code to get the accurate user's location...

watchID=navigator.geolocation.watchPosition(handleGetCurrentPosition, handleGetCurrentPositionError, {enableHighAccuracy:true});

function handleGetCurrentPosition(location)
{   
    document.getElementById("lat").value = location.coords.latitude;
    document.getElementById("lon").value = location.coords.longitude;
    document.getElementById("accu").value =location.coords.accuracy;
    document.forms["myform"].submit();
}

function handleGetCurrentPositionError(){
    alert("Location could not be found.")
}

bt the result i am getting is not accurate. Is there any problem the code i am using?

Answer 1

The accuracy depends on capabilities of your Geolocation device. navigator.geolocation is just an API which works with that device. If the device does not support high accuracies, you can't do anything with it.

Answer 2

this the below code to get accurate location. i have written this code in HTML 5.

1. Create a map placeholder in html document.

< output id="mapToYou" >Searching for your current location...< /output >

1. Call this js script in page load.

window.addEventListener("load", function() {
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(success, error);
        } else {
            error('not supported');
        }
    },false);

    function success(position) {
        var mapToYou = document.querySelector('#mapToYou');
        alert("Gotcha!");
        var latlng = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
        var myOptions = {
                    zoom: 15,
                    center: latlng,
            mapTypeControl: false,
            navigationControlOptions: {
                style: google.maps.NavigationControlStyle.SMALL
            },
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };

        var googleMap = new google.maps.Map(mapToYou, myOptions);
        var marker = new google.maps.Marker({
          position: latlng, 
          map: googleMap, 
          title:"You are here!"
        });
    }

    function error(msg) {
        var mapToYou = document.querySelector('#mapToYou');
        mapToYou.innerHTML = typeof msg == 'string' ? msg : "failed";
        mapToYou.className = 'fail';

        // console.log(arguments);
    }

Answer 3

Have you tried Google's location api's?

If not, here is the link: https://developers.google.com/maps/documentation/directions/

Actually there are a lot of on-going APIs that are developed by Google to increase the accuracy of location finding

Answer 4

I found this useful link at : http://www.geoplugin.com , provides a very good location filtering API and has really scary precision at predicting user location.

Here is an example of how this is to be used: http://www.jquery4u.com/api-calls/geo-location-2-lines-javascript/#.T_QZrxdo3IU