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Geo Coordinates

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May 17.2020

This one will be a challenge.

I have a table in my database of cities. They all have a geo lat and lon coordinate in the same row. That location is central of the city.

In a second table, I have a list of stores. Each store has a geo lat/lon of it’s location.

What I want is when someone searches a city. Los Angeles for example. It want it to return all stores within a 100m radius of the city lat/lon location.

Any ideas for a starting point?

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@SempervivumMay 17.2020 — It's easy to find an algorithm to calculate the distance between two points defined by lat/lng:

https://stackoverflow.com/questions/6981916/how-to-calculate-distance-between-two-locations-using-their-longitude-and-latitu

(the accepted answer posted by Rasel)

Note that the resulting distance is aerial, not on road.
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