Hi Massimo,
Have you tried implementing custom projection by inheriting from our SpatialReference class. Basically it implements the mentioned
GographicToLocigal and
LogicalToGeographic functions:
/// <summary>
/// The OGC Spatial Reference requirements.
/// </summary>
public class SpatialReference : ISpatialReference
....
/// <summary>
/// Converts a geographical coordinate (Longitude, Latitude) to a logical Point (0->1).
/// </summary>
/// <param name="geographicPoint">The geographical coordinate (Longitude, Latitude).</param>
/// <returns>The logical Point.</returns>
public virtual Point GeographicToLogical(Location geographicPoint)
{
double d = Math.Sin(geographicPoint.Latitude * this.AngularUnitOfMeasurement);
Point point = new Point((geographicPoint.Longitude * this.AngularUnitOfMeasurement * this.ScaleX) + this.OffsetX,
(0.5 * Math.Log((1.0 + d) / (1.0 - d)) * this.ScaleY) + this.OffsetY);
if (point.Y > 1)
{
point.Y = 1;
}
return point;
}
/// <summary>
/// Converts a logical Point (0->1) to a geographical coordinate (Longitude, Latitude).
/// </summary>
/// <param name="logicalPoint">The logical Point.</param>
/// <returns>The geographical coordinate (Longitude, Latitude).</returns>
public virtual Location LogicalToGeographic(Point logicalPoint)
{
return new Location(
Math.Atan(Math.Sinh((logicalPoint.Y - this.OffsetY) / this.ScaleY)) * RadiansToDegrees,
(logicalPoint.X - this.OffsetX) * RadiansToDegrees / this.ScaleX);
}
Regards,
Petar Mladenov
Telerik by Progress