Feature.MoveOnEarthAsCompass Method
Moves the Feature while keeping its true size and shape on Earth.
MoveOnEarthAsCompass(Point fromLongLat, Point toLongLat, Point compassPoleLongLat)
Moves the Feature while keeping its true size and shape on Earth.Syntax
public void MoveOnEarthAsCompass (
Point fromLongLat,
Point toLongLat,
Point compassPoleLongLat
)Parameters
the start point (where a drag-and-drop starts).
the end point (where a drag-and-drop ends).
Anchor point that the feature keeps facing.
Remarks
This method supports moving the feature while letting it keep its true size and shape on Earth, as opposed to its size and shape in the projection of its coordinate reference system. It is assumed that fromLongLat is the cursor position on or near the Feature when the mouse button is pressed, that toLongLat is the cursor position when the mouse button is released, and that compassPoleLongLat is an anchor point, towards which the Feature keeps facing the same side. For example, if the compassPoleLongLat is the north pole, the same side of the Feature will keep facing north.
All three positions should be expressed in longitude and latitude. Their geodetic datum is seldom important for this method, but strictly speaking it should be the same as the one used by Feature.Crs.
The method is not implemented for features with raster geometries.
Example
// Moves the Feature while keeping its true size and shape on Earth.
public static void MoveFeatureOnEarthAsCompass(Feature feature, Point fromLongLat, Point toLongLat)
{
// Anchor point that the feature keeps facing. In our case it's the North pole.
// If the compassPoleLongLat is the north pole, the same side of the Feature will keep facing north.
Point compassPoleLongLat = new Point(0, 90);
// Move the feature while letting it keep its true size and shape on Earth,
// as opposed to its size and shape in the projection of its coordinate reference system.
feature.MoveOnEarthAsCompass(fromLongLat, toLongLat, compassPoleLongLat);
}
Platforms
Windows, Linux, Android