/// <summary>
/// Projects the specified geometry.
/// </summary>
/// <param name="geometry">The geometry.</param>
/// <param name="outSpatialReference">The out spatial reference.</param>
/// <returns></returns>
private static Geometry.Geometry Project(Geometry.Geometry geometry, SpatialReference outSpatialReference)
{
var toMercator = outSpatialReference.WKID != 4326;
if (geometry != null && geometry.SpatialReference != null &&
!geometry.SpatialReference.Equals(outSpatialReference))
{
Projection.WebMercator projector = new Projection.WebMercator();
if (toMercator && geometry.SpatialReference.WKID == 4326)
//Data is 4326 and must projected to webmercator
return projector.FromGeographic(geometry);
if (!toMercator && MercatorSref.Equals(geometry.SpatialReference))
//Data is in webmercator and must be projected to 4326
return projector.ToGeographic(geometry);
}
// Other cases : geometry without SR, geometry already in the right SR, unsupported SR -> return the input geometry
return geometry;
}
private static void ProjectGroundOverlays(ElementLayer layer, SpatialReference sref)
{
var proj = new Projection.WebMercator();
var webMercatorSR = new SpatialReference(102100);
var wgs84SR = new SpatialReference(4326);
foreach (UIElement elt in layer.Children)
{
var envelope = elt.GetValue(ElementLayer.EnvelopeProperty) as Envelope;
if (envelope != null)
{
if (webMercatorSR.Equals(envelope.SpatialReference) && wgs84SR.Equals(sref))
{
var env = proj.ToGeographic(envelope) as Envelope;
elt.SetValue(ElementLayer.EnvelopeProperty, env);
}
else if (wgs84SR.Equals(envelope.SpatialReference) && webMercatorSR.Equals(sref))
{
var env = proj.FromGeographic(envelope) as Envelope;
elt.SetValue(ElementLayer.EnvelopeProperty, env);
}
}
}
}