# How to get x, y plane with height map coordinates from click event?

**URL:** <https://forum.babylonjs.com/t/how-to-get-x-y-plane-with-height-map-coordinates-from-click-event/9876>\
**Category:** Questions\
**Created:** [April 9, 2020, 11:41pm UTC](https://forum.babylonjs.com/t/how-to-get-x-y-plane-with-height-map-coordinates-from-click-event/9876 "2020-04-09T23:41:04Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![hhaamm](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/hhaamm/32/7476_2.png) [@hhaamm](https://forum.babylonjs.com/u/hhaamm)\
**Post date:** [April 9, 2020, 11:41pm UTC](https://forum.babylonjs.com/t/how-to-get-x-y-plane-with-height-map-coordinates-from-click-event/9876/1 "2020-04-09T23:41:04Z")

</div>

I have a height map and a click event in this way:

```
  const groundPlane = BABYLON.Mesh.CreateGroundFromHeightMap(
    "ground", 
    heightMap.toDataURL(), 
    width,
    height, 
    subdivisions, 
    0, // Altura más baja
    10, // Altura más alta
    scene,
    false
  );

  // ...

  groundPlane.actionManager = new BABYLON.ActionManager(scene);
  groundPlane.actionManager.registerAction(new BABYLON.ExecuteCodeAction(BABYLON.ActionManager.OnPickTrigger, function (evt) {
    console.log(evt.pointerX, evt.pointerY);
    console.log(evt);
  }));

```

But it looks like the pointerX and pointerY have some coordinates that are not the x, y coordinates of the plane, I’m not sure what coordinates they are (they look like x, y coordinates of the scene screen).

The question is how to get the x, y coordinates of the _plane_ (which has a height map), if that’s possible. Basically the plane represents a terrain and I want to know where the user clicked so I can do actions depending on the place that was clicked.

(The ground is a plane, not multiple objects / meshes because doing that was not performant)

---

<div class="post-metadata">

**Author:** ![syntheticmagus](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/syntheticmagus/32/395_2.png) [@syntheticmagus](https://forum.babylonjs.com/u/syntheticmagus)\
**Post date:** [April 10, 2020, 11:45am UTC](https://forum.babylonjs.com/t/how-to-get-x-y-plane-with-height-map-coordinates-from-click-event/9876/2 "2020-04-10T11:45:49Z")

</div>

Hi hhaamm,

I think there are some features of the mesh picking capabilities that might help with what you’re trying to do. Check out the [Picking Collisions documentation](https://doc.babylonjs.com/babylon101/picking_collisions) and see if that does the trick.

(If that’s not what you’re looking for, then I’ve likely misunderstood something and might need to see a Playground to understand better.)