ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.CIM Namespace / MaplexLabelRotationType Enumeration
Example Example

In This Topic
    MaplexLabelRotationType Enumeration
    In This Topic
    Maplex rotation types.
    Syntax
    Members
    MemberDescription
    Arithmetic Arithmetic rotation.
    AV3 ArcView 3 rotation.
    Geographic Geographic rotation.
    Radians Rotation in radians.
    Example
    Modify label Rotation - Point geometry
    //Note: call within QueuedTask.Run()
    
    //Get the layer's definition
    var lyrDefn = featureLayer.GetDefinition() as CIMFeatureLayer;
    //Get the label classes - we need the first one
    var listLabelClasses = lyrDefn.LabelClasses.ToList();
    var theLabelClass = listLabelClasses.FirstOrDefault();
    //Modify label Rotation
    CIMMaplexRotationProperties rotationProperties = new CIMMaplexRotationProperties
    {
      Enable = true, //Enable rotation
      RotationField = "ELEVATION", //Field that is used to define rotation angle
      AdditionalAngle = 15, //Additional rotation 
      RotationType = MaplexLabelRotationType.Arithmetic,
      AlignmentType = MaplexRotationAlignmentType.Perpendicular,
      AlignLabelToAngle = true
    };
    theLabelClass.MaplexLabelPlacementProperties.RotationProperties = rotationProperties;
    lyrDefn.LabelClasses = listLabelClasses.ToArray(); //Set the labelClasses back
    featureLayer.SetDefinition(lyrDefn); //set the layer's definition
    Inheritance Hierarchy

    System.Object
       System.ValueType
          System.Enum
             ArcGIS.Core.CIM.MaplexLabelRotationType

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also