Calculate which store is closest to user through geolocation

Question

I'm developing a website and in the contacts page I need to assist the user to find the closest store and give the user directions to it on google maps!

The company has 4 stores in the city (and I have the latitudes & longitudes for all stores).

When the user presses a button I get the latitude & longitude of the user.

So far so good! Now I need to calculate which store is closest to user. How can I do this?

Do you mean the actual formula? http://en.wikipedia.org/wiki/Great-circle_distance — rlb, Mar 14 '13 at 08:49
Have you considered using the [Google Distance Matrix API](https://developers.google.com/maps/documentation/distancematrix/) to calculate the route and distance to each store and compare that? — RobG, Mar 14 '13 at 10:33
@RobG no it's going to be to many request to send if they have more then 4 store! but tnx for the tips! — E P, Mar 14 '13 at 12:11

score 1 · Accepted Answer · edited May 23 '17 at 12:23

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In terms of straight line distance you can make use of the Haversine formula that calculates the distance between two points each defined by a latitude and longitude

Haversine in PHP or Haversine in Python

edited May 23 '17 at 12:23

Community

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answered Mar 14 '13 at 08:53

Conway Stern

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Tnx a lot just needed the name of the formula! – E P Mar 14 '13 at 12:11

Calculate which store is closest to user through geolocation

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