SnapMsToSpatialReference Method (IGeometryEngine)

In This Topic

Snaps the M-values to the M-precision (1 / MScale) of the spatial reference associated with the input geometry.

Syntax

C#
Visual Basic (Declaration)

Geometry SnapMsToSpatialReference( 
   Geometry geometry
)

Function SnapMsToSpatialReference( _
   ByVal geometry As Geometry _
) As Geometry

Parameters

geometry: The input geometry.

Return Value

The geometry with the M-values snapped to the precision of the spatial reference. If the geometry is empty or the spatial reference is null, then the input geometry is returned unchanged.

Exceptions

Exception	Description
System.ArgumentNullException	Geometry is null.
System.InvalidOperationException	This geometry is not M-Aware.
System.NotImplementedException	The method is not implemeted for GeometryBag.

Example

Snap the M-values to the M-precision of the spatial reference - SnapMsToSpatialReference

SpatialReference sr = SpatialReferences.WebMercator;  // precision = 1 / MScale = 0.0001

// MapPoint
MapPointBuilderEx pointBuilder = new MapPointBuilderEx(3, 4, sr);
pointBuilder.M = 5.00006;
MapPoint point = pointBuilder.ToGeometry();
MapPoint outputPoint = GeometryEngine.Instance.SnapMsToSpatialReference(point) as MapPoint;
// outputPoint.M = 5.0001

// Multipoint
pointBuilder = new MapPointBuilderEx(-3, -4, sr);
pointBuilder.M = -5.000007;
MapPoint point2 = pointBuilder.ToGeometry();
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(new MapPoint[] { point, point2 }, AttributeFlags.HasM, sr);
Multipoint outputMultipoint = GeometryEngine.Instance.SnapMsToSpatialReference(multipoint) as Multipoint;
// outputMultipoint.Points[0].M = 5.0001, outputMultipoint.Points[1].M = -5

// Polyline
string json = "{\"hasM\":true,\"paths\":[[[3,2,10.00065],[3,4,15.000325],[5,4,20],[5,2,15.000325],[3,2,10.00065]]],\"spatialReference\":{\"wkid\":3857}}";
Polyline polyline = PolylineBuilderEx.FromJson(json);
Polyline outputPolyline = GeometryEngine.Instance.SnapMsToSpatialReference(polyline) as Polyline;
// The M-values for the vertices in outputPolyline are { 10.0007, 15.0003, 20, 15.0003, 10.0007 }

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.3 or higher.

Reference

IGeometryEngine Interface
IGeometryEngine Members

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