MySQL select coordinates within range

Question

I\'ve in my database 100 000 addresses (that is records).

Each one of them has its own coordinates (latitude and longitude).

Now, given the geo location of

Answer 1

You can use what is called the Haversine formula.

$sql = "SELECT *, ( 3959 * acos( cos( radians(" . $lat . ") ) * cos( radians( lat ) ) * cos( radians( lng ) - radians(" . $lng . ") ) + sin( radians(" . $lat . ") ) * sin( radians( lat ) ) ) ) AS distance FROM your_table HAVING distance < 5";

Where $lat and $lng are the coordinates of your point, and lat/lng are your table columns. The above will list the locations within a 5 nm range. Replace 3959 by 6371 to change to kilometers.

This link could be useful: https://developers.google.com/maps/articles/phpsqlsearch_v3

Edit: I didn't see you mentioned Java. This example is in PHP but the query is still what you need.