﻿ Generalize3D Method (GeometryEngine)—ArcGIS Pro
ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / Generalize3D Method
The geometry to be generalized.
The maximum distance in meters that the output geometry can deviate from the input geometry.
Example

In This Topic
Generalize3D Method (GeometryEngine)
In This Topic
Performs the generalize operation on the geometry.
Syntax
```public Geometry Generalize3D(
Geometry geometry,
double maxDeviation
)```
```Public Function Generalize3D( _
ByVal geometry As Geometry, _
ByVal maxDeviation As Double _
) As Geometry```

#### Parameters

geometry
The geometry to be generalized.
maxDeviation
The maximum distance in meters that the output geometry can deviate from the input geometry.

#### Return Value

The generalized geometry. If the input geometry is empty, then it is returned unchanged.
Exceptions
ExceptionDescription
Geometry is null.
The method is not implemented for GeometryBag or Multipatch.
This geometry is not Z-Aware.
The geometry is of an incorrect type. (i.e. a point or multipoint).
Cannot do 3D operations on curve segments.
Remarks
Generalize3D performs a Douglas-Peucker Generalization algorithm, extended to operate in 3D space, with a specified maximum offset tolerance, given in 3D, as input. For line segments, the generalized output is a subset of the original input vertices. For non-linear segments, the generalized output contains points along all parts of the curve, not necessarily only the vertices.
Example
Generalize
```Polyline generalizedPolyline = GeometryEngine.Instance.Generalize(polylineWithZ, 200) as Polyline;
// generalizedPolyline.HasZ = true

Polygon generalized3DPolyline = GeometryEngine.Instance.Generalize3D(polylineWithZ, 200) as Polygon;
// generalized3DPolyline.HasZ = true

// note that generalized3DPolyline and generalizedPolyline will have different definitions
//  ie generalizedPolyline.IsEqual(generalized3DPolyline) = false
```
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.