CoreandServices.book - Ocean - Schlumberger

Coordinate Systems
class uses the methods of the inherited Matrix4 class. Forward and inverse conversions
are possible. The LocalTransform class is defined as:
public class LocalTransform
{
public LocalTransform ();
public Matrix4 Matrix { get; set; }
public string Name { get; set; }
public IUnit SurfaceUnit { get; set; }
public IUnit VerticalUnit { get; set; }
}
public ICoordsysConverter ForwardConverter(PrePostUnitConversions
prePost);
public ICoordsysConverter InverseConverter(PrePostUnitConversions
prePost);
The following example shows the transformation of a point from X, Y to I, J. It used three
corner points of a grid or survey expressed in X, Y and I, J representations to create a
matrix in the LocalTransform object. From this, forward and inverse converters are
created and points may be given to them for conversion to the other domain.
// Create the local transform object
LocalTransform localT = new LocalTransform();
// Initialize the three X.Y corner points for our data.
Point2 lowerLeftXY = new Point2(100000.0, 100000.0);
Point2 upperLeftXY = new Point2(100000.0, 200000.0);
Point2 upperRightXY = new Point2(200000.0, 200000.0);
// Initialize the three I,J corner points for our data.
Point2 lowerLeftIJ = new Point2(350.0, 425.0);
Point2 upperLeftIJ = new Point2(350.0, 585.0);
Point2 upperRightIJ = new Point2(600.0, 585.0);
4-222 Ocean Application Development Framework 2008.1
Schlumberger Private