ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / NearestVertex Method
The geometry.
The point to which the returned vertex will be nearest.
Example Version

NearestVertex Method (GeometryEngine)
Finds the nearest vertex in the geometry to a specified point.
Syntax
public ProximityResult NearestVertex( 
   Geometry geometry,
   MapPoint point
)

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.
See Also