﻿ SetConstantZ Method (GeometryEngine)—ArcGIS Pro
ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / SetConstantZ Method
The polygon or polyline to replace Zs.
The Z value to assign.
Example

In This Topic
SetConstantZ Method (GeometryEngine)
In This Topic
Replaces each Z value on the geometry with the specified Z-value.
Syntax
```public Multipart SetConstantZ(
Multipart multipart,
double zValue
)```
```Public Function SetConstantZ( _
ByVal multipart As Multipart, _
ByVal zValue As Double _
) As Multipart```

#### Parameters

multipart
The polygon or polyline to replace Zs.
zValue
The Z value to assign.

#### Return Value

A geometry in which each coordinate has the specified Z-value. If the input multipart is empty, then it is returned unchanged.
Exceptions
ExceptionDescription
Multipart is null.
This geometry is not Z-Aware.
Example
Set all Zs in a polyline
```List<Coordinate3D> coordsZ = new List<Coordinate3D>()
{
new Coordinate3D(1, 2, 3),
new Coordinate3D(4, 5, 6),
new Coordinate3D(7, 8, double.NaN)
};

Polyline polyline = PolylineBuilderEx.CreatePolyline(coordsZ);
// polyline.HasZ = true

Polyline polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, -1) as Polyline;
// polylineSetZ.Points[0].Z = -1
// polylineSetZ.Points[1].Z = -1
// polylineSetZ.Points[2].Z = -1

polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, double.NaN) as Polyline;
// polyline.HasZ = true
// polylineSetZ.Points[0].HasZ = true
// polylineSetZ.Points[0].Z = NaN
// polylineSetZ.Points[1].HasZ = true
// polylineSetZ.Points[1].Z = NaN
// polylineSetZ.Points[2].HasZ = true
// polylineSetZ.Points[2].Z = NaN

polylineSetZ = GeometryEngine.Instance.SetConstantZ(polyline, double.PositiveInfinity) as Polyline;
// polyline.HasZ = true
// polylineSetZ.Points[0].HasZ = true
// polylineSetZ.Points[0].Z = double.PositiveInfinity
// polylineSetZ.Points[1].HasZ = true
// polylineSetZ.Points[1].Z = double.PositiveInfinity
// polylineSetZ.Points[2].HasZ = true
// polylineSetZ.Points[2].Z = double.PositiveInfinity```
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.