using longitude and latitude google maps code example

Example 1: how to calculate nearest location using longitude and latitude

SELECT id, ( 3959 * acos( cos( radians(37) ) * cos( radians( lat ) ) * cos( radians( lng ) - radians(-122) ) + sin( radians(37) ) * sin( radians( lat ) ) ) ) AS distance FROM markers HAVING distance < 25 ORDER BY distance LIMIT 0 , 20;

Example 2: geojson longitude latitude order

[longitude, latitude, elevation]