ChangedPrimeMeridianDatumShift Class
Says that two geodetic datums differ only in their prime meridian.
NuGet/Assembly: Carmenta.Engine.5.16.2.nupkg (in the CECore assembly)
Syntax
public class ChangedPrimeMeridianDatumShift : DatumShiftRemarks
A ChangedPrimeMeridianDatumShift is used to relate two geodetic datums that differ only in their prime meridian. For example, you can first define a GeodeticDatum for the Italian Monte Mario datum, whose PrimeMeridian is Greenwich. Then, you can define a GeodeticDatum for Monte Mario (Rome), which is the same datum, except that its prime meridian is Rome instead of Greenwich. You must tell Carmenta Engine that the prime meridian is the only difference between these datums, so when you define the datum for Monte Mario (Rome), you must attach a ChangedPrimeMeridianDatumShift with Monte Mario as its KnownDatum. You do not need to specify the longitude difference between Greenwich and Rome in the ChangedPrimeMeridianDatumShift: it can be computed automatically, since the Greenwich meridian is part of the Monte Mario datum, and the Rome meridian is part of the Monte Mario (Rome) datum.
Terminology
This class corresponds to what EPSG calls the coordinate operation method "Longitude Rotation".
Inheritance Hierarchy
System.Object (not available in C#)
EngineObject
ResourceObject
DatumShift
ChangedPrimeMeridianDatumShift
Platforms
Windows, Linux, Android
ChangedPrimeMeridianDatumShift Members
The ChangedPrimeMeridianDatumShift type has the following members.
Constructors
| Name | Description |
|---|---|
| ChangedPrimeMeridianDatumShift | Creates a new ChangedPrimeMeridianDatumShift. |
Properties
| Name | Description |
|---|---|
| Authority | Gets the name of an authority, which is often "epsg". Inherited from DatumShift |
| AuthorityCode | Gets the unique code for the datum shift instance, according to the Authority, for example "15978". Inherited from DatumShift |
| Info | Gets documentation like accuracy and area of use. Inherited from DatumShift |
| IsDisposed | Gets a value that tells whether the current ChangedPrimeMeridianDatumShift has been disposed. Inherited from EngineObject |
| KnownDatum | Gets the known datum, usually WGS84. Inherited from DatumShift |
| Name | Gets or sets the name of the ChangedPrimeMeridianDatumShift. Inherited from ResourceObject |
| NativeHandle | Gets the native Carmenta Engine kernel object the current ChangedPrimeMeridianDatumShift represents. Inherited from EngineObject |
| IUserProperties.UserProperties | Gets the AttributeSet that contains the user properties. Inherited from IUserProperties |
Methods
| Name | Description |
|---|---|
| Clone | Creates a copy of an object. Inherited from EngineObject |
| Dispose | Releases the reference to the native Carmenta Engine kernel instance the EngineObject represents. Inherited from EngineObject |
| Equals | Determines whether this instance is equal to another. Inherited from EngineObject |
 FromInfo | Constructs a datum shift from a DatumShiftInfo. Inherited from DatumShift |