﻿ GetMMonotonic Method (GeometryEngine)—ArcGIS Pro
ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / GetMMonotonic Method
The multipart to check for monotonicity.
Example

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GetMMonotonic Method (GeometryEngine)
In This Topic
Determines whether Ms are monotonic, and if so, whether they are ascending or descending.
Syntax
```public MonotonicType GetMMonotonic(
Multipart multipart
)```
```Public Function GetMMonotonic( _
ByVal multipart As Multipart _
) As MonotonicType```

#### Parameters

multipart
The multipart to check for monotonicity.

#### Return Value

MonotonicType indicating whether or not the Ms are monotonic as well as whether they are ascending or descending.
Exceptions
ExceptionDescription
Multipart is null.
The geometry is not M-Aware.
Remarks
The Ms are ascending if the Ms are ordered such that M1 < M2 < M3 < . . . < Mn. The Ms are descending if the Ms are ordered such that M1 > M2 > M3 > . . . > Mn
Example
Determine whether Ms are monotonic and whether ascending or descending - GetMMonotonic
```string json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,20]]]}";
Polyline polyline = PolylineBuilderEx.FromJson(json);

MonotonicType monotonic = GeometryEngine.Instance.GetMMonotonic(polyline);
// monotonic = Monotonic.Ascending

json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,5],[-1000,-2000,0]]]}";
polyline = PolylineBuilderEx.FromJson(json);

monotonic = GeometryEngine.Instance.GetMMonotonic(polyline);
// monotonic = Monotonic.Descending

json = "{\"hasM\":true,\"paths\":[[[-3000,-2000,10],[-2000,-2000,15],[-1000,-2000,0]]]}";
polyline = PolylineBuilderEx.FromJson(json);

monotonic = GeometryEngine.Instance.GetMMonotonic(polyline);
// monotonic = Monotonic.NotMonotonic
```
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.