Create z-aware polygon that contains parametric curves

EdwardBlair — Wed, 26 Nov 2025 16:13:36 GMT

I've got polygons in my source data which are not z-aware that include, in nearly all cases, one or more parametric curves. I want to create polygons that *are* z-aware in my UN database from the source polygons.

I can use the PolygonBuilderEx to create a new z-aware polygon from all of the points in my source polygon with the code below -- but I lose the curves.

Polygon polygon = inGeom as Polygon;
IReadOnlyList<Coordinate3D> pt3dList = polygon.Copy3DCoordinatesToList();
Polygon polygon3D = PolygonBuilderEx.CreatePolygon(pt3dList, sr);

Is there a way to do this that retains curves *and* assigns a z value?

Thanks in advance for any suggestions.

Re: Create z-aware polygon that contains parametric curves

GKmieliauskas — Wed, 26 Nov 2025 20:41:02 GMT

Hi,

Take a look at the other thread. @AnnetteLocke sample for works for me.

Re: Create z-aware polygon that contains parametric curves

EdwardBlair — Thu, 27 Nov 2025 14:46:22 GMT

Works great! Thank you.

topic Re: Create z-aware polygon that contains parametric curves in ArcGIS Pro SDK Questions

Create z-aware polygon that contains parametric curves

Re: Create z-aware polygon that contains parametric curves

Re: Create z-aware polygon that contains parametric curves