# IFC class for ground level (site)

**URL:** <https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234>\
**Category:** IFC\
**Created:** [May 13, 2022, 1:41pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234 "2022-05-13T13:41:27Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Hans\_Lammerts](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/hans_lammerts/32/835_2.png) [@Hans\_Lammerts](https://forums.buildingsmart.org/u/Hans_Lammerts)\
**Post date:** [May 13, 2022, 1:41pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234/1 "2022-05-13T13:41:27Z")

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Whats is the right class for site - gorund level?  
A draped mesh object (dutch AHN values) using Blender  
No export in IFC now

 ![afbeelding](https://us1.discourse-cdn.com/flex016/uploads/buildingsmart1/original/2X/5/5eba17bd0bb41f50d4bca1136e977bf24c8be589.jpeg)

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**Author:** ![jwouellette](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/jwouellette/32/2140_2.png) [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\
**Post date:** [May 13, 2022, 3:09pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234/2 "2022-05-13T15:09:09Z")

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IFC2x3 or IFC4?

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**Author:** ![daviddelven](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/daviddelven/32/2384_2.png) [@daviddelven](https://forums.buildingsmart.org/u/daviddelven)\
**Post date:** [May 13, 2022, 3:22pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234/3 "2022-05-13T15:22:34Z")

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Assuming you mean an object with shape representation (that mesh) , it might be IfcGeographicElement.TERRAIN in IFC4 ?

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**Author:** ![Moult](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/moult/32/196_2.png) [@Moult](https://forums.buildingsmart.org/u/Moult)\
**Post date:** [May 16, 2022, 11:37am UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234/4 "2022-05-16T11:37:31Z")

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Note that the IfcSite itself may have geometry.

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<div class="post-metadata">

**Author:** ![jwouellette](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/jwouellette/32/2140_2.png) [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\
**Post date:** [May 16, 2022, 1:38pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234/5 "2022-05-16T13:38:48Z")

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> [@Moult](#):
>
> Note that the IfcSite itself may have geometry.

I think that was only for IFC2x3. I believe for certification in IFC4 IfcSite was not where geometry is defined but as @daviddelven indicated.

That’s why I asked whether is was IFC2x3 or IFC4.

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<div class="post-metadata">

**Author:** ![Hans\_Lammerts](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/hans_lammerts/32/835_2.png) [@Hans\_Lammerts](https://forums.buildingsmart.org/u/Hans_Lammerts)\
**Post date:** [May 16, 2022, 6:22pm UTC](https://forums.buildingsmart.org/t/ifc-class-for-ground-level-site/4234/6 "2022-05-16T18:22:29Z")

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Whatever it takes. So IFC4.  
Blender doesn’t seem to have ifcgeographicselementterrain.  
it does have class ifcsite. seems ok  
assigned it  
~160 MB about same as size in Blender  
But nothing shows up in my ifc viewer BIM vision

 ![Knipsel3](https://us1.discourse-cdn.com/flex016/uploads/buildingsmart1/original/2X/f/fc4c6b8314d3b121b335022439310bd11a2a062a.jpeg)  
 ![Knipsel2](https://us1.discourse-cdn.com/flex016/uploads/buildingsmart1/original/2X/7/74bd4b9e949aebbf5b44fb20a4bd1203278bbac3.jpeg)