Weed Method (IGeometryEngine)

In This Topic

Generalizes the multipart using a small tolerance based upon either the units of the geometry's spatial reference or the geometry's bounding box.

Syntax

C#
Visual Basic (Declaration)

Multipart Weed( 
   Multipart multipart,
   double maxDeviation
)

Function Weed( _
   ByVal multipart As Multipart, _
   ByVal maxDeviation As Double _
) As Multipart

Parameters

multipart: The multipart to generalize.
maxDeviation: The maximum deviation used to calculate the deviation used in the Douglas-Peucker generalization algorithm. Cannot be NaN. If maxDeviation is > 0, then internal deviation = maxDeviation * internal tolerance. If maxDeviation is <= 0, then internal deviation = 10000.0 * internal tolerance.

Return Value

The generalized multipart.

Exceptions

Exception	Description
System.ArgumentNullException	The input multipart is null.
System.ArgumentException	The maxDeviation parameter is NaN.

Remarks

For a multipart with non-linear segments, the output multipart may contain more vertices than the input multipart, but all output segments will be linear.

Example

Generalize a multipart - Weed

// generalize with a maxDeviation of 0
Polyline weedPolyline = GeometryEngine.Instance.Weed(polyline, 0) as Polyline;

// generalize with a maxDeviation < 0
weedPolyline = GeometryEngine.Instance.Weed(polyline, -1000000) as Polyline;

// generalize with a maxDeviation > 0
weedPolyline = GeometryEngine.Instance.Weed(polyline, 1000000) as Polyline;

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.5 or higher.

Reference

IGeometryEngine Interface
IGeometryEngine Members

Send feedback