RotatedProjection Class
A rotation of a basic map projection.
NuGet/Assembly: Carmenta.Engine.5.16.2.nupkg (in the CECore assembly)
Syntax
public class RotatedProjection : ProjectionRemarks
A RotatedProjection is created from a BaseProjection, a Center, and an angle called Up. The result is that the BaseProjection is rotated around the Center, counterclockwise by the Up angle.
For an ordinary map display, it is usually easier to use the View.Rotation property instead. But if you need to store rotated data, for example as a Shapefile, it may be better to use a RotatedProjection.
A cylindrical projection like Mercator usually has its minimal x at 180°W and its maximal x at 180°E, but the projection knows that 180°W equals 180°E on the round earth, so it is possible to show both sides of meridian 180° in a single map. However, this knowledge disappears when a cylindrical projection is rotated: on a rotated Mercator, the world will appear to start at 180°W and stop at 180°E.
Inheritance Hierarchy
System.Object (not available in C#)
EngineObject
ResourceObject
Projection
RotatedProjection
Platforms
Windows, Linux, Android
RotatedProjection Members
The RotatedProjection type has the following members.
Constructors
| Name | Description |
|---|---|
| RotatedProjection | Initializes a new instance of the RotatedProjection class from a base projection, center, and up direction. |
Properties
| Name | Description |
|---|---|
| Authority | Gets the name of an authority, which is often "epsg". Inherited from Projection |
| AuthorityCode | Gets the unique code for the projection instance, according to the Authority, for example "19883". Inherited from Projection |
| BaseProjection | Gets the unrotated base projection. |
| Center | Gets the fixed center of the rotation, expressed in the BaseProjection. |
| IsDisposed | Gets a value that tells whether the current RotatedProjection has been disposed. Inherited from EngineObject |
 LongLat | Gets a pre-defined LongLatProjection instance. Inherited from Projection |
| Name | Gets or sets the name of the RotatedProjection. Inherited from ResourceObject |
| NativeHandle | Gets the native Carmenta Engine kernel object the current RotatedProjection represents. Inherited from EngineObject |
| Up | Gets the rotation angle, counterclockwise in degrees. |
| 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 |
| Utm | Returns one of the 120 predefined instances of Universal Transverse Mercator. Inherited from Projection |