# Polygon Contains Cartographic

**URL:** <https://community.cesium.com/t/polygon-contains-cartographic/9172>\
**Category:** CesiumJS\
**Created:** [March 18, 2020, 2:56pm UTC](https://community.cesium.com/t/polygon-contains-cartographic/9172 "2020-03-18T14:56:20Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![omar](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/omar/32/1999_2.png) [@omar](https://community.cesium.com/u/omar)\
**Post date:** [March 19, 2020, 12:15pm UTC](https://community.cesium.com/t/polygon-contains-cartographic/9172/2 "2020-03-19T12:15:04Z")

</div>

There isn’t a built-in way to do this as far as I’m aware, but detecting if a point is inside a polygon is a common graphics operation (you’ll find a few different algorithms if you google that).

You could use a library like TurfJS and give it the coordinates of your polygons/points: [https://turfjs.org/docs/#pointsWithinPolygon](https://turfjs.org/docs/#pointsWithinPolygon)

What kind of application are you working on?

---

_[View the full topic](https://community.cesium.com/t/polygon-contains-cartographic/9172)._