Used to transform coordinates of z-aware geometries between spatial references that have different geographic and/or vertical coordinate systems.
public sealed class HorizontalVerticalTransformation : DatumTransformation
The inverse of this transformation, used to transform in the opposite direction, is returned from the GetInverse() method.
A HorizontalVerticalTransformation can be constructed from a single HorizontalVerticalTransformationStep object, or from a number of transformation step objects that are chained together.
You can get a list of suitable transformations for a given input and output spatial reference using one of the methods on the TransformationCatalog class.
Some transformations require that certain Projection Engine data files be present on the local file system, and vertical transformation steps are especially likely to use such files, which can be very large in size. The IsMissingProjectionEngineFiles property indicates whether any of the files are missing. The complete list of necessary files for each specific step is available using the ProjectionEngineFilenames property.
A HorizontalVerticalTransformation object is immutable. A HorizontalVerticalTransformation is an ordered list of HorizontalVerticalTransformationStep objects. Each HorizontalVerticalTransformation has an input and an output SpatialReference, and this HorizontalVerticalTransformation object can be used to convert coordinates between the horizontal (geographic) and vertical datums of these spatial references using the series of steps it contains. Use the Project(Geometry, SpatialReference, DatumTransformation) method to transform the coordinates of a specific Geometry. A horizontal transformation step is not needed when the input and output spatial references have the same underlying geographic coordinate systems. A vertical transformation is not needed if both datums (for ellipsoidal heights) or vertical datums (for gravity-related heights) are the same. To transform coordinates only between different horizontal (geographic) coordinate systems, you can use a GeographicTransformation instead.
Initializes a new instance of the HorizontalVerticalTransformation class with a single-step transformation.
Initializes a new instance of the HorizontalVerticalTransformation class from one or more HorizontalVerticalTransformationStep instances.
Gets the list of transformation steps that define this transformation.
|.NET Standard 2.0||100.10 - 200.0|
|.NET 6.0||100.13 - 200.0|
|.NET 6.0 Windows||100.13 - 200.0|
|.NET 6.0 Android||200|
|.NET 6.0 iOS||200|
|.NET Framework||100.10 - 200.0|
|.NET 5||100.10 - 100.12|
|.NET Core 3.1||100.10 - 100.12|
|Android||100.10 - 100.15|
|iOS||100.10 - 100.15|
|UWP||100.10 - 200.0|