private static IEnumerable <ImageOverlay> ReadGroundOverlays(XmlDocument kmlDocument)
{
foreach (XmlElement groundOverlayElement in kmlDocument.GetElementsByTagName("GroundOverlay"))
{
LatLonBox latLonBox = null;
string imagePath = null;
int zIndex = 0;
foreach (var childElement in groundOverlayElement.ChildNodes.OfType <XmlElement>())
{
switch (childElement.LocalName)
{
case "LatLonBox":
latLonBox = ReadLatLonBox(childElement);
break;
case "Icon":
imagePath = ReadImagePath(childElement);
break;
case "drawOrder":
int.TryParse(childElement.InnerText.Trim(), out zIndex);
break;
}
}
if (latLonBox != null && imagePath != null)
{
yield return(new ImageOverlay(latLonBox, imagePath, zIndex));
}
}
}
// Rotation of corners of map
private List <Tuple <double, double> > GetCornersWithRotation(LatLonBox latLonBox)
{
double n = (double)latLonBox.North;
double s = (double)latLonBox.South;
double e = (double)latLonBox.East;
double w = (double)latLonBox.West;
double rotation = (double)latLonBox.Rotation;
double a = (e + w) / 2.0;
double b = (n + s) / 2.0;
double squish = Math.Cos(DegToRad(b));
double x = squish * (e - w) / 2.0;
double y = (n - s) / 2.0;
double X, Y;
List <Tuple <double, double> > corners = new List <Tuple <double, double> >();
X = b - (x * Math.Sin(DegToRad(rotation)) - y * Math.Cos(DegToRad(rotation)));
Y = a - (x * Math.Cos(DegToRad(rotation)) + y * Math.Sin(DegToRad(rotation))) / squish;
corners.Add(Tuple.Create(X, Y));
X = b + (x * Math.Sin(DegToRad(rotation)) + y * Math.Cos(DegToRad(rotation)));
Y = a + (x * Math.Cos(DegToRad(rotation)) - y * Math.Sin(DegToRad(rotation))) / squish;
corners.Add(Tuple.Create(X, Y));
X = b - (x * Math.Sin(DegToRad(rotation)) + y * Math.Cos(DegToRad(rotation)));
Y = a - (x * Math.Cos(DegToRad(rotation)) - y * Math.Sin(DegToRad(rotation))) / squish;
corners.Add(Tuple.Create(X, Y));
X = b + (x * Math.Sin(DegToRad(rotation)) - y * Math.Cos(DegToRad(rotation)));
Y = a + (x * Math.Cos(DegToRad(rotation)) + y * Math.Sin(DegToRad(rotation))) / squish;
corners.Add(Tuple.Create(X, Y));
X = b - (x * Math.Sin(DegToRad(rotation)) - y * Math.Cos(DegToRad(rotation)));
Y = a - (x * Math.Cos(DegToRad(rotation)) + y * Math.Sin(DegToRad(rotation))) / squish;
corners.Add(Tuple.Create(X, Y));;
return(corners);
}
private List <Tuple <double, double> > GetCornersWithoutRotation(LatLonBox latLonBox)
{
List <Tuple <double, double> > corners = new List <Tuple <double, double> > ();
corners.Add(Tuple.Create((double)latLonBox.North, (double)latLonBox.West));
corners.Add(Tuple.Create((double)latLonBox.North, (double)latLonBox.East));
corners.Add(Tuple.Create((double)latLonBox.South, (double)latLonBox.East));
corners.Add(Tuple.Create((double)latLonBox.South, (double)latLonBox.West));
corners.Add(Tuple.Create((double)latLonBox.North, (double)latLonBox.West));
return(corners);
}
private List <Tuple <double, double> > GetMapCorners(LatLonBox latLonBox)
{
if (latLonBox != null)
{
if (latLonBox.North != null &&
latLonBox.South != null &&
latLonBox.East != null &&
latLonBox.West != null)
{
if (latLonBox.Rotation != null)
{
return(GetCornersWithRotation(latLonBox));
}
return(GetCornersWithoutRotation(latLonBox));
}
}
return(null);
}
public ImageOverlay(LatLonBox latLonBox, string imagePath, int zIndex)
{
LatLonBox = latLonBox;
ImagePath = imagePath;
ZIndex = zIndex;
}
/// <summary>
/// This method stores the given box into the database
/// </summary>
/// <param name="box">Box to be saved</param>
/// <param name="insertedKmlId">The KmlId to connect this object to</param>
/// <param name="con">Sql connection</param>
/// <param name="tran">Sql transaction</param>
/// <returns>The database id which is assigned to the given box</returns>
protected static int?SaveLatLonBox(Geography box, int insertedKmlId, SqlConnection con, SqlTransaction tran)
{
#region Insert Geography
int?insertedGeographyId = null;
if (box != null)
{
SqlCommand saveGeographyCmd =
new SqlCommand(
" insert into Geographies(Geography, KmlId) " +
" values(geography::Parse('" + box.ToString() + "'), @KmlId);select scope_identity()", con, tran);
AddParameter(saveGeographyCmd, "KmlId", insertedKmlId, DbType.Int32);
insertedGeographyId = (int)((decimal)saveGeographyCmd.ExecuteScalar());
box.DbId = insertedGeographyId;
}
#endregion
#region Insert Lat Lon Box
SqlCommand saveLatLonBox =
new SqlCommand(
" insert into LatLonBoxes(BoxType, GeographyId, rotation, MinAlt, MaxAlt, AltitudeMode) " +
" values(@BoxType, @GeographyId, @rotation, @MinAlt, @MaxAlt, @AltitudeMode);select scope_identity()",
con, tran);
AddParameter(saveLatLonBox, "GeographyId", insertedGeographyId, DbType.Int32);
LatLonBox latLonBox = box as LatLonBox;
LatLonAltBox latLonAltBox = box as LatLonAltBox;
LatLonQuad latLonQuad = box as LatLonQuad;
string BoxType = "";
if (latLonBox != null)
{
BoxType = "LatLonBox";
AddParameter(saveLatLonBox, "rotation", latLonBox.Rotation, DbType.Double);
}
else
{
AddParameter(saveLatLonBox, "rotation", null, DbType.Double);
}
if (latLonAltBox != null)
{
BoxType = "LatLonAltBox";
AddParameter(saveLatLonBox, "MinAlt", latLonAltBox.MinAltitude, DbType.Double);
AddParameter(saveLatLonBox, "MaxAlt", latLonAltBox.MaxAltitude, DbType.Double);
AddParameter(saveLatLonBox, "AltitudeMode", latLonAltBox.AltitudeMode.ToString(), DbType.String);
}
else
{
AddParameter(saveLatLonBox, "MinAlt", null, DbType.Double);
AddParameter(saveLatLonBox, "MaxAlt", null, DbType.Double);
AddParameter(saveLatLonBox, "AltitudeMode", null, DbType.Double);
}
if (latLonQuad != null)
{
BoxType = "LatLonQuad";
}
AddParameter(saveLatLonBox, "BoxType", BoxType, DbType.String);
int?insertedLatLonBox = (int)((decimal)saveLatLonBox.ExecuteScalar());
#endregion
return(insertedLatLonBox);
}