private void Parse(Stream stream)
{
var doc = new XmlDocument();
doc.Load(stream);
var nsmgr = new XmlNamespaceManager(doc.NameTable);
var ns = "";
if (doc.DocumentElement != null && doc.DocumentElement.Attributes["xmlns"] != null)
{
nsmgr.AddNamespace("ns", doc.DocumentElement.Attributes["xmlns"].Value);
ns = "ns:";
}
var groundOverlays = doc.SelectNodes(string.Format("//{0}GroundOverlay[1]", ns), nsmgr);
if (groundOverlays != null && groundOverlays.Count > 0)
{
var iconNodes = groundOverlays[0].SelectNodes(string.Format("{0}Icon/{0}href", ns), nsmgr);
if (iconNodes != null && iconNodes.Count > 0)
{
ImageFileName = iconNodes[0].InnerText;
}
var latLonBoxNodes = groundOverlays[0].SelectNodes(string.Format("{0}LatLonBox", ns), nsmgr);
if (latLonBoxNodes != null && latLonBoxNodes.Count > 0)
{
LongLatBox = new LongLatBox()
{
North =
Convert.ToDouble(latLonBoxNodes[0].SelectSingleNode(string.Format("{0}north", ns), nsmgr).InnerText,
CultureInfo.InvariantCulture),
South =
Convert.ToDouble(latLonBoxNodes[0].SelectSingleNode(string.Format("{0}south", ns), nsmgr).InnerText,
CultureInfo.InvariantCulture),
West =
Convert.ToDouble(latLonBoxNodes[0].SelectSingleNode(string.Format("{0}west", ns), nsmgr).InnerText,
CultureInfo.InvariantCulture),
East =
Convert.ToDouble(latLonBoxNodes[0].SelectSingleNode(string.Format("{0}east", ns), nsmgr).InnerText,
CultureInfo.InvariantCulture),
Rotation =
Convert.ToDouble(latLonBoxNodes[0].SelectSingleNode(string.Format("{0}rotation", ns), nsmgr).InnerText,
CultureInfo.InvariantCulture) / 180.0 * Math.PI
};
}
}
}
public Transformation(LongLatBox longLatBox, Size imageSize)
{
// calculate projection origin
ProjectionOrigin = new LongLat((longLatBox.East + longLatBox.West) / 2,
(longLatBox.North + longLatBox.South) / 2);
// get image corners from kml file
var imageCornerLongLats = longLatBox.GetRotatedBoxCornerLongLats();
// project them on flat surface
var projectedImageCorners = new Dictionary <Corner, PointD>();
projectedImageCorners[Corner.NorthWest] = imageCornerLongLats[Corner.NorthWest].Project(ProjectionOrigin);
projectedImageCorners[Corner.SouthEast] = imageCornerLongLats[Corner.SouthEast].Project(ProjectionOrigin);
// calculate transformation matrix
TransformationMatrix = LinearAlgebraUtil.CalculateTransformationMatrix(
projectedImageCorners[Corner.NorthWest], new PointD(0, 0),
projectedImageCorners[Corner.SouthEast], new PointD(imageSize.Width - 1, imageSize.Height - 1), null, true);
}