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kotlinlang

I will want to check if the customer location(lat long) is inside a polygon(area)

For a really simple solution, you create a *bounding box* (your polygon/area) and compare the coordinates like
```if (customer.latitude &gt; northWestBounds.latitude &amp;&amp; customer.longitude &gt; northWestBounds.longitude)```
This comparison needs to take care of *the upper-left (NorthWest) and the bottom-right (SouthEast)*

There are more complex solutions where the polygon is not rectangular

On the Java platform you can just use the <https://github.com/locationtech/jts|JTS> library which does exactly that. There are also implementations for other languages (but not Kotlin, AFAIK) which you could access via expect/actual.

In addition to some of the libraries that might have been listed in the repo posted in the previous thread, I've implemented this particular function (and a few others) here: <https://dellisd.github.io/spatial-k/api/turf/io.github.dellisd.spatialk.turf/boolean-point-in-polygon.html>

as I pointed before there is library Geok

<@UJ456JG2K> unfortunately library Geok does not work with iOS yet:

Write the author to add m1 simulator target