This document is archived and information here might be outdated.  Recommended version.


Projection Class (ArcObjects .NET 10.7 SDK)
ArcObjects Help for .NET developers > ArcObjects Help for .NET developers > ArcObjects namespaces > Geometry > ESRI.ArcGIS.Geometry > Classes > P > Projection Class
ArcGIS Developer Help

ProjectionClass Class

Creates a map projection.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Extended Error Information

Use the ISupportErrorInfo method InterfaceSupportsErrorInfo to determine if the object supports extended error information. If the object supports extended error info, VC++ developers should use the OLE/COM IErrorInfo interface to access the ErrorInfo object. Visual Basic developers should use the global error object Err to retrieve this extended error information.

Interfaces

Interfaces Description
IClone (esriSystem) Provides access to members that control cloning of objects.
IESRISpatialReference Provides access to members that control the import/export operations components of a spatial reference system. This interface has been deprecated and IESRISpatialReferenceGEN should be used.
IESRISpatialReferenceGEN Provides access to members that generate well known string (WKS) representations of spatial reference objects. IESRISpatialReference has been deprecated and IESRISpatialReferenceGEN should be used.
IESRISpatialReferenceGEN2 Provides access to members that generate well known string representations for spatial reference objects. The strings include authority metadata.
IPersist (esriSystem)
IPersistStream (esriSystem)
IProjection Provides access to members that control the properties of all map projections.
IProjectionGEN OLE compatibility for providing access to members that control the properties of all map projections.
ISpatialReferenceAuthority Provides access to the authority-related metadata for a spatial reference object.
ISupportErrorInfo (esriSystem)

Remarks

A Projection object encapsulates the mathematics needed to convert geographic coordinates between two different coordinate systems. A projection is a component of a projected coordinate system and is not usually used directly. Rather, a projected cooordinate system is defined and used to project cooordinates.