Order table by proximity to specific latitude/longitude (using MySQL+PHP)

Question

MySQL (table)

id | url |    lat    |    lng
----------------------------------
1  |  x  | 44.339565 | -101.337891
----------------------------------
2  |  y  | 4         


        

Answer 1

You may be interested in checking out the following presentation:

• Geo/Spatial Search with MySQL¹ by Alexander Rubin

The author describes how you can use the Haversine Formula in MySQL to order by proximity and limit your searches to a defined range. He also describes how to avoid a full table scan for such queries, using traditional indexes on the latitude and longitude columns.

---

¹ PDF Version