How to analyze the Core principles of Redis GeoHash

How to analyze the core principles of Redis GeoHash, I believe that many inexperienced people are at a loss about this. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

1. Introduction

Mai classmate is a foodie + tech nerd. On weekdays, he likes to look up some interesting things by holding a map and clicking on it. One day I went to Beihai Park and got hungry, so I opened my mobile phone map, searched for restaurants near Beihai Park, and chose one of them for dinner.

After dinner, Uncle Mai, who is full of warm thoughts, thinks about how the background of the map can query nearby restaurants according to his location. After thinking hard for a long time, wheat came up with a way: calculate the distance between the location P and all the restaurants in Beijing, and then return the distance.