﻿ NearestVertex Method (GeometryEngine)—ArcGIS Pro
ArcGIS Pro 3.2 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / NearestVertex Method
The geometry.
The point to which the returned vertex will be nearest.
Example

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NearestVertex Method (GeometryEngine)
In This Topic
Finds the nearest vertex in the geometry to a specified point.
Syntax
```public ProximityResult NearestVertex(
Geometry geometry,
MapPoint point
)```
```Public Function NearestVertex( _
ByVal geometry As Geometry, _
ByVal point As MapPoint _
) As ProximityResult```

#### Parameters

geometry
The geometry.
point
The point to which the returned vertex will be nearest.

#### Return Value

ProximityResult.

ProximityResult.PointIndex is the index of the nearest vertex.

ProximityResult.SegmentIndex is null.

ProximityResult.PartIndex is the index of the part containing the nearest vertex.

Proximity.RightSide = false.

If either of the input geometries are empty, then ProximityResult.Distance = -1, ProximityResult.Point is empty, ProximityResult.PartIndex = -1, ProximityResult.PointIndex is null, and ProximityResult.SegmentIndex = null.

Exceptions
ExceptionDescription
Either geometry or point or both are null or empty.
The method is not implemented for GeometryBag.
Example
Nearest Point versus Nearest Vertex
```SpatialReference sr = SpatialReferences.WGS84;
MapPoint pt = MapPointBuilderEx.CreateMapPoint(5, 5, sr);

List<Coordinate2D> coords = new List<Coordinate2D>()
{
new Coordinate2D(10, 1),
new Coordinate2D(10, -4),
new Coordinate2D(0, -4),
new Coordinate2D(0, 1),
new Coordinate2D(10, 1)
};

Polygon polygon = PolygonBuilderEx.CreatePolygon(coords);

// find the nearest point in the polygon geomtry to the pt
ProximityResult result = GeometryEngine.Instance.NearestPoint(polygon, pt);
// result.Point = 5, 1
// result.SegmentIndex = 3
// result.PartIndex = 0
// result.PointIndex = null
//result.Distance = 4
//result.RightSide = false

// find the nearest vertex in the polgyon geometry to the pt
result = GeometryEngine.Instance.NearestVertex(polygon, pt);
// result.Point = 10, 1
// result.PointIndex = 0
// result.SegmentIndex = null
// result.PartIndex = 0
// result.Distance = Math.Sqrt(41)
// result.RightSide = false```
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.