# Polysurface from Polycurves

**URL:** <https://forum.dynamobim.com/t/polysurface-from-polycurves/6446>\
**Category:** Geometry\
**Created:** [September 29, 2016, 10:23pm UTC](https://forum.dynamobim.com/t/polysurface-from-polycurves/6446 "2016-09-29T22:23:03Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jwade](https://avatars.discourse-cdn.com/v4/letter/j/6bbea6/32.png) [@jwade](https://forum.dynamobim.com/u/jwade)\
**Post date:** [September 29, 2016, 10:23pm UTC](https://forum.dynamobim.com/t/polysurface-from-polycurves/6446/1 "2016-09-29T22:23:03Z")

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Hi all,

What is the best way to create a polysurface from polycurves? I think there is a solution with creating a mesh first, but I’m not sure. I’ve been using Dynamo to modify Revit files, but I haven’t dealt much with the different types of geometries in Dynamo. Any help would be great!

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**Author:** ![Vikram\_Subbaiah](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/vikram_subbaiah/32/50797_2.png) [@Vikram\_Subbaiah](https://forum.dynamobim.com/u/Vikram_Subbaiah)\
**Post date:** [September 30, 2016, 2:43am UTC](https://forum.dynamobim.com/t/polysurface-from-polycurves/6446/2 "2016-09-30T02:43:58Z")

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@jwade A surface should do, I suppose

 ![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/2X/c/c24704254e2e3491ba95d3dbbf6702fa05cc8e04.png)

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**Author:** ![jwade](https://avatars.discourse-cdn.com/v4/letter/j/6bbea6/32.png) [@jwade](https://forum.dynamobim.com/u/jwade)\
**Post date:** [October 1, 2016, 2:09pm UTC](https://forum.dynamobim.com/t/polysurface-from-polycurves/6446/3 "2016-10-01T14:09:29Z")

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VIkram,

Thank you for the reply. This works for simple polycurves, but the curves I am trying to turn into a surface is shown below (including curve points). These lines represent topography, so each one is at a different elevation than its neighbor. I get errors because the surfaces that would be created would intersect themselves. Are there nodes/functions to handle this kind of geometry?

I could use the lines to create a topo surface in Revit, but doing so would add to the size of the model. I’d rather maintain lines in Revit and have dynamo create the surface when needed.

 ![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/2X/a/ab029592ba3055fb851ea541364ac849d4719606.png)

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**Author:** ![RitaAguiar](https://avatars.discourse-cdn.com/v4/letter/r/e9a140/32.png) [@RitaAguiar](https://forum.dynamobim.com/u/RitaAguiar)\
**Post date:** [October 3, 2019, 4:36pm UTC](https://forum.dynamobim.com/t/polysurface-from-polycurves/6446/4 "2019-10-03T16:36:54Z")

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Hi @jwade  
Did you manage to do this?

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**Author:** ![tordare.meisterplass](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/tordare.meisterplass/32/88130_2.png) [@tordare.meisterplass](https://forum.dynamobim.com/u/tordare.meisterplass)\
**Post date:** [February 18, 2020, 10:51am UTC](https://forum.dynamobim.com/t/polysurface-from-polycurves/6446/5 "2020-02-18T10:51:48Z")

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I am also curious; did you manage this with complex polycurves?