﻿ SimplifyOgc Method (GeometryEngine)—ArcGIS Pro
ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / SimplifyOgc Method
The geometry to be simplified.
(Optional) The default value is false. When true, it forces the simplification code to be applied to the geometry even if the geometry comes from a trusted source or has already been simplified. When false, the method will do nothing if called on the same geometry a second time.
Example

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SimplifyOgc Method (GeometryEngine)
In This Topic
Simplifies the given geometry according to the Open Geospatial Consortium (OGC) validation specification.
Syntax
```public Geometry SimplifyOgc(
Geometry geometry,
bool forceSimplify
)```
```Public Function SimplifyOgc( _
ByVal geometry As Geometry, _
ByVal forceSimplify As Boolean _
) As Geometry```

#### Parameters

geometry
The geometry to be simplified.
forceSimplify
(Optional) The default value is false. When true, it forces the simplification code to be applied to the geometry even if the geometry comes from a trusted source or has already been simplified. When false, the method will do nothing if called on the same geometry a second time.

#### Return Value

The simplified geometry.
Exceptions
ExceptionDescription
The input geometry is null.
The method is not implemented for GeometryBag or Multipatch.
Remarks
The OGC specification is defined in OpenGIS Implementation Standard for Geographic information – simple feature access – Part 1: common architecture.

A geometry that is simplified using this method will be simple for IsSimpleAsFeature and SimplifyAsFeature.

Example
SimplifyOgc
```
SpatialReference sr = SpatialReferences.WGS84;

Coordinate2D[] coords = new Coordinate2D[] { new Coordinate2D(5, 10), new Coordinate2D(15, 20), new Coordinate2D(25, 10), new Coordinate2D(5, 20) };
Polyline polyline = PolylineBuilderEx.CreatePolyline(coords, sr);
// polyline.IsKnownSimpleOgc = false
// polyline.IsKnownSimple = false

NonSimpleReason nonSimpleReason;
bool isSimple = GeometryEngine.Instance.IsSimpleOgc(polyline, out nonSimpleReason, true);
// isSimple = false
// nonSimpleReason = NonSimpleReason.SelfIntersections

Polyline simplePolyline = GeometryEngine.Instance.SimplifyOgc(polyline) as Polyline;
// simplePolyline.IsKnownSimpleOgc = true
// simplePolyline.IsKnownSimple = true

double resolution = sr.XYResolution;
Coordinate3D[] coords3D = new Coordinate3D[] { new Coordinate3D(0, 0, 0), new Coordinate3D(0, 1.8 * resolution, 0.8 * sr.ZTolerance), new Coordinate3D(10, 10, 1),
new Coordinate3D(0, 5, 1) };
polyline = PolylineBuilderEx.CreatePolyline(coords3D, sr);

isSimple = GeometryEngine.Instance.IsSimpleOgc(polyline, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.ShortSegments

simplePolyline = GeometryEngine.Instance.SimplifyOgc(polyline, true) as Polyline;
// simplePolyline.IsKnownSimpleOgc = true
// simplePolyline.IsKnownSimple = true

coords = new Coordinate2D[] { new Coordinate2D(0, 0), new Coordinate2D(0, 0) };
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(coords, sr);

isSimple = GeometryEngine.Instance.IsSimpleOgc(multipoint, out nonSimpleReason);
// isSimple = false
// nonSimpleReason = NonSimpleReason.DuplicateVertex```
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.2 or higher.
See Also