Check if point is inside circle from PHP - Google maps

Question

I am building an application that has to show some markers to the user basing on a circle characteristics.

Specifically, a PHP script will be called with two parameters:

The script has a LOT (~16000) of coordinates pairs, but it takes no time to him to scan them all.

Instead, sending the whole thing to the client browser and have him elaborate the thing is crazy slow.

So, I would like to know this: Can I, via PHP, scan all the entries and head out to the listening js only those whose coordinates are in the circle?

Thank you, Riccardo

How/where do you store the coordinates that your PHP script would process? Database? Flat file? That is the main information missing in your question. — MrUpsidown, Feb 13 '15 at 18:53
Hi. Those are DB stored. A query would be the best chioce, but I don't know if I'm so lucky — Guerriky, Feb 14 '15 at 19:31
Check [this answer](http://stackoverflow.com/a/21043061/1238965). It will do what you want. Don't forget to upvote :) — MrUpsidown, Feb 15 '15 at 10:47

score 0 · Answer 1 · edited May 23 '17 at 11:50

0

If the distance from the point to the center of the circle is less than the radius of the circle, the point is inside the circle.

edited May 23 '17 at 11:50

Community

answered Feb 13 '15 at 16:56

geocodezip

Thank, I was looking for something like that. I'll give it a try. Thanks again. – Guerriky Feb 14 '15 at 19:33

1 Answers1