# camera go down under the ground

**URL:** <https://community.cesium.com/t/camera-go-down-under-the-ground/7125>\
**Category:** CesiumJS\
**Created:** [July 6, 2018, 10:14am UTC](https://community.cesium.com/t/camera-go-down-under-the-ground/7125 "2018-07-06T10:14:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![oliverzhangvvv](https://avatars.discourse-cdn.com/v4/letter/o/ecc23a/32.png) [@oliverzhangvvv](https://community.cesium.com/u/oliverzhangvvv)\
**Post date:** [July 6, 2018, 10:14am UTC](https://community.cesium.com/t/camera-go-down-under-the-ground/7125/1 "2018-07-06T10:14:07Z")

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I have some question when using Cesium to render Terrain. The camera will go down under the ground and sometime throw an exception, which stops the rendering. The image show the problem when occured. How can I solve  
the problem. I wish forbid the camera to go down under the ground.

 ![image.png](https://global.discourse-cdn.com/cesium/original/1X/c37674d669877db3820e4e74e4446888903ec6eb.png)

 ![image(1).png](https://global.discourse-cdn.com/cesium/original/1X/54efc37fbcb8f7f322d20dbf122c8c719d9ab220.png)

 ![image(2).png](https://global.discourse-cdn.com/cesium/original/1X/e907df8c2d1cb6804b74474fdb00ea03a429d729.png)

**The Cesium version is 1.47, win10 system, chrome**

 ![image.png](https://global.discourse-cdn.com/cesium/original/1X/c37674d669877db3820e4e74e4446888903ec6eb.png)

 ![image(1).png](https://global.discourse-cdn.com/cesium/original/1X/54efc37fbcb8f7f322d20dbf122c8c719d9ab220.png)

 ![image(2).png](https://global.discourse-cdn.com/cesium/original/1X/e907df8c2d1cb6804b74474fdb00ea03a429d729.png)

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**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:** [July 6, 2018, 8:05pm UTC](https://community.cesium.com/t/camera-go-down-under-the-ground/7125/2 "2018-07-06T20:05:44Z")

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Looks like this is a popular feature request for Cesium that just hasn’t been implemented yet. You can follow the discussion/progress on it here:

> <https://github.com/CesiumGS/cesium/issues/4802>
>
> I've seen this requested on the forum a handful of times, most recently here: https://groups.google.com/forum/?hl=en#!topic/cesium-dev/z-kWiAZ1Jfg
> For some applications, it would be helpful...

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**Author:** ![Ashley\_Mort](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/ashley_mort/32/8527_2.png) [@Ashley\_Mort](https://community.cesium.com/u/Ashley_Mort)\
**Post date:** [August 15, 2019, 2:36pm UTC](https://community.cesium.com/t/camera-go-down-under-the-ground/7125/3 "2019-08-15T14:36:48Z")

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We would also be interested in this feature/fix. We see the error like “cannot read property west of undefined” sometimes if the user zooms to an odd location.