How can I check the distance between two latitude and longitude coorindates?

Question

I'm fetching the user's best current position using this snippet:

    LocationManager ltrLocationer = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_FINE);
    Location locLocation = ltrLocationer.getLastKnownLocation(ltrLocationer.getBestProvider(criteria, true));

I have a two Double objects containing a latitude and a longitude respectively. I'd like to check the distance in metres between the current coordinates and the the aforementioned value. How can I do this?

This sounded like a pretty simple thing to accomplish but I haven't been able to find an example illustrating this. Thanks.

You're right. I suggested it be closed. – Mridang Agarwalla Mar 27 '13 at 13:51 — Mridang Agarwalla, Mar 27 '13 at 13:51

score 2 · Accepted Answer · answered Mar 27 '13 at 13:07

2

The Location object has a distance method. Use that, it does the math for you. If you have your coordinates as douboles, use the static function Location.distanceBetween

answered Mar 27 '13 at 13:07

Gabe Sechan

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score 1 · Answer 2 · answered Mar 27 '13 at 12:44

1

take a look here :GPS Coordinates to Meters Also here is a wikipedia article about the equation used to do the calculations: Haversine formula

answered Mar 27 '13 at 12:44

Mr.Me

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score 0 · Answer 3 · answered Mar 27 '13 at 12:41

Check this method, this will give you the distance in a straight line.

public static double distFrom(double lat1, double lng1, double lat2, double lng2) {
double earthRadius = 3958.75;
double dLat = Math.toRadians(lat2-lat1);
double dLng = Math.toRadians(lng2-lng1);
double sindLat = Math.sin(dLat / 2);
double sindLng = Math.sin(dLng / 2);
double a = Math.pow(sindLat, 2) + Math.pow(sindLng, 2)
        * Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2));
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
double dist = earthRadius * c;

return dist;
}

If you want a road distance this operation is a little bit more difficult and will involve a call to Google Direction API services.

How can I check the distance between two latitude and longitude coorindates?

3 Answers3