ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / Map Class / SetReferenceScale Method
A double represents the reference scale of the map.

In This Topic
    SetReferenceScale Method
    In This Topic
    Updates the reference scale of the map. This method must be called on the MCT. Use QueuedTask.Run.
    Syntax
    public void SetReferenceScale( 
       double referenceScale
    )
    Public Sub SetReferenceScale( _
       ByVal referenceScale As Double _
    ) 

    Parameters

    referenceScale
    A double represents the reference scale of the map.
    Exceptions
    ExceptionDescription
    This method or property must be called within the lambda passed to QueuedTask.Run.
    Remarks
    When reference scale is set and a FeatureLayer's ScaleSymbols property is set to true, symbol size will get larger if you zoom in to a scale larger than the ReferenceScale and smaller if you zoom out to a scale smaller than the ReferenceScale.
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also