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hii ..
i have latitude and longitude of source and how to find direction among them..

i already tried with following function ,which shows the direction by address ...

function calcRoute() {
       var start = document.getElementById('startvalue').value;
       var end = document.getElementById('endvalue').value;
       var request = {
           origin: start,
           destination: end,
           travelMode: google.maps.DirectionsTravelMode.DRIVING
       directionsService.route(request, function (response, status) {
           if (status == google.maps.DirectionsStatus.OK) {

but i want to find direction by latitude and longitude of that source and destination..please suggest me some modification in this function...

thank u...
Posted 23-Apr-13 7:23am
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Solution 1

The Vincenty's formulae will help you. Please start from here:[^].

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Solution 2

Actually the Great Circle formulas will give a good approximation, you don't need to use the Vincenty formula unless you are doing extremely precise stuff (need directions in decimal degrees over great distances).
Ron Beyer at 23-Apr-13 23:54pm

Scroll down and there are script examples, they are in Java but easy to convert.

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