ArcObjects Library Reference (Geometry)

IGeoTransformationOperationSet Interface

Provides access to members that control a set of geographic transformation operators (GT + direction).

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Description

Use the GeotransformationOperationSet to project geometries having different geographic coordinate systems using the IGeometry::Project method. Use the IGeotransformationOperationSet methods to cache a set of Geotransformations in memory. This set is used by the software when projecting a geometry using the IGeometry::Project . If the geographic coordinate systems of the from/to spatial reference are different then the system looks in the GeoTranformationOperationSet to find a matching geotransformation. If no appropriate geotransformation is found, no geotransformation is applied.

When To Use

Useful when working with datasets that have multiple spatial references. Used in ArcCatalog to store any necessary transformations.

Members

	Name	Description
	Count	The number of geographic transformations in the set.
	Find	Check a geographic transformation and a direction to see if it exists in the set.
	Get	Returns a default geographic transformation.
	Next	Retrieves the next geographic transformation in the set.
	Remove	Deletes a particular geographic transformation.
	RemoveAll	Deletes all transformations in the set.
	RemoveByKey	Deletes a particular geographic transformation by its from and to GCS.
	Reset	Reinitializes the transformation set iterator.
	Set	Sets a default geographic transformation.

CoClasses that implement IGeoTransformationOperationSet

CoClasses and Classes	Description
GeoTransformationOperationSet	Stores a set of geographic transformation operators (GT + direction).

.NET Related Topics

Creating a custom geotransformation | How to project a raster with a datum transformation | How to use the IGeoTransformationOperationSet methods