ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / HVDatumTransformation Class
Members

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    HVDatumTransformation Class
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    A hv (horizontal/vertical) datum transformation is used when projecting Z-Aware geometries between two different geographic coordinate systems and two different vertical coordinate systems. As with geographic transformations, a hv datum transformation converts everything that needs to be changed including the units, prime meridian, and the ellipsoid. In addition, a hv datum transformation transforms height. Every transformation is defined in a particular forward direction, but all are reversible. For example, suppose your Z-Aware geometry is in WGS84 with vertical coordinate system EGM2008_Geoid, and you want to project to NAD83_2011 with vertical coordinate system NAD83_2011. A hv datum transformation is defined to project your Z-Aware geometry from WGS84 with vertical coordinate system EGM2008_Geoid to NAD83_2011 with vertical coordinate system NAD83_2011. If you are projecting from NAD83_2011 with vertical coordinate system NAD83_2011 to WGS84 with vertical coordinate system EGM2008_Geoid to NAD83_2011, you can use the reversed form of the transformation.
    Object Model
    HVDatumTransformation ClassHVDatumTransformation ClassDatumTransformation ClassSpatialReference ClassSpatialReference Class
    Syntax
    public sealed class HVDatumTransformation : DatumTransformation 
    Public NotInheritable Class HVDatumTransformation 
       Inherits DatumTransformation
    Inheritance Hierarchy

    System.Object
       ArcGIS.Core.Geometry.DatumTransformation
          ArcGIS.Core.Geometry.HVDatumTransformation

    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also