CalculateNonSimpleMs Method (IGeometryEngine)

In This Topic

Calculates M attribute values for each non-simple (NaN) M-value from existing simple (non-NaN) M attributes on the specified geometry. The non-simple M-values are obtained by extrapolation/interpolation for polylines and interpolation for polygons.

Syntax

C#
Visual Basic (Declaration)

Multipart CalculateNonSimpleMs( 
   Multipart multipart,
   double defaultMValue
)

Function CalculateNonSimpleMs( _
   ByVal multipart As Multipart, _
   ByVal defaultMValue As Double _
) As Multipart

Parameters

multipart: The multipart to calculate M-values for.
defaultMValue: The value to which NaN M-values that could not be interpolated will be set.

Return Value

A geometry in which each coordinate has a simple (non-NaN) M-value.

Exceptions

Exception	Description
System.ArgumentNullException	Multipart is null or empty.
System.InvalidOperationException	This geometry is not M-Aware.

Example

Interpolate M values on a polygon

List<MapPoint> coords = new List<MapPoint>()
{
  MapPointBuilderEx.CreateMapPoint(0, 0, 0, 0),
  MapPointBuilderEx.CreateMapPoint(0, 1000),
  MapPointBuilderEx.CreateMapPoint(1000, 1000, 10, 50)
};

SpatialReference sr = SpatialReferences.WebMercator;

Polygon polygon = PolygonBuilderEx.CreatePolygon(coords, sr);

// polygon.HasM = true
// polygon.Points[1].HasM = true
// polygon.Points[1].M = NaN

Polygon polygonNoNaNMs = GeometryEngine.Instance.CalculateNonSimpleMs(polygon, 0) as Polygon;

// polygonNoNaNMs.Points[1].HasM = true
// polygonNoNaNMs.Points[1].M = 25  (halfway between 0 and 50)

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.

Reference

IGeometryEngine Interface
IGeometryEngine Members

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