# Topography subregion is created in other topography even selecting the wanted

**URL:** <https://forum.dynamobim.com/t/topography-subregion-is-created-in-other-topography-even-selecting-the-wanted/72873>\
**Category:** Revit\
**Tags:** revit, python, geometry, dynamo\
**Created:** [February 2, 2022, 9:10am UTC](https://forum.dynamobim.com/t/topography-subregion-is-created-in-other-topography-even-selecting-the-wanted/72873 "2022-02-02T09:10:09Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ruben.romero](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/ruben.romero/32/115842_2.png) [@ruben.romero](https://forum.dynamobim.com/u/ruben.romero)\
**Post date:** [February 2, 2022, 9:10am UTC](https://forum.dynamobim.com/t/topography-subregion-is-created-in-other-topography-even-selecting-the-wanted/72873/1 "2022-02-02T09:10:09Z")

</div>

Hello,

I am experiencing so strange Revit behaviour with topography elements. When creating topography subregion sketch, Revit does not ask to select the topography to be subdivided, in my case it choses a topography that is hidden in other design option rather than the Main topography.

trying to resolve that, I run a dynamo script that selects existing subregions and take the sketches and create subregions with it in the selected topography but it does not work.

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/5/15db09a7c043eaba117dd8f070c1d91d406245d4.png)