The document discusses different techniques for performing geo-spatial searches with MySQL to find points of interest near a given location. It covers calculating distance between points using the Haversine formula, optimizing queries by limiting the search area, and using spatial extensions, full-text search, or external search engines like Sphinx to enable both geo and text searches. Demo examples show finding nearby POIs matching a keyword within a radius of the user's GPS point.

1. Geo/Spatial Search with MySQL Alexander Rubin Senior Consultant, MySQL AB

3. POI Search Example

5. Latitudes and Longitudes

6. Distance between 2 points The Haversine Formula For two points on a sphere (of radius R) with latitudes φ1 and φ2, latitude separation Δφ = φ1 − φ2, and longitude separation Δλ the distance d between the two points:

19. Speed comparison of all solutions