# 3D Tiles Building positioned above the world.HELP!

**URL:** <https://community.cesium.com/t/3d-tiles-building-positioned-above-the-world-help/5685>\
**Category:** CesiumJS\
**Created:** [June 21, 2017, 2:28pm UTC](https://community.cesium.com/t/3d-tiles-building-positioned-above-the-world-help/5685 "2017-06-21T14:28:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![guojinshan12388](https://avatars.discourse-cdn.com/v4/letter/g/b77776/32.png) [@guojinshan12388](https://community.cesium.com/u/guojinshan12388)\
**Post date:** [June 21, 2017, 2:28pm UTC](https://community.cesium.com/t/3d-tiles-building-positioned-above-the-world-help/5685/1 "2017-06-21T14:28:53Z")

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Have you solved your problem? I have the same problem as you

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<div class="post-metadata">

**Author:** ![sean\_lilley](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sean_lilley/32/2083_2.png) [@sean\_lilley](https://community.cesium.com/u/sean_lilley)\
**Post date:** [June 23, 2017, 12:06am UTC](https://community.cesium.com/t/3d-tiles-building-positioned-above-the-world-help/5685/2 "2017-06-23T00:06:22Z")

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If your tileset is similar, we discovered that there is a problem in the root tileset.json file where a geometricError isn’t specified. Make sure to add the geometric error like below (the value you use should be equal to its parent’s geometric error).

“children”: [

{

“boundingVolume”: {

“sphere”: [

4364741.3891374189406633,

511291.0278625306673348,

4608281.8367103915661573,

493.3407689303687107

]

},

“geometricError”: 493.3407689303687107,

“content”: {

“url”: “Data/Model/Model.json”

}

}

]