/// <summary>
/// Extracts a polygon from the input element and applies style information to the placemark descriptor.
/// </summary>
/// <param name="kmlStyle">KML Style information.</param>
/// <param name="geomElement">Polygon geometry information.</param>
/// <returns>A PlacemarkDescriptor object representing the feature.</returns>
private static PlacemarkDescriptor ExtractPolygon(KMLStyle kmlStyle, XElement geomElement)
{
XNamespace kmlNS = geomElement.Name.Namespace;
ESRI.ArcGIS.Client.Geometry.Polygon polygon = new Polygon();
// Extract outer polygon boundary
XElement boundary;
boundary = geomElement.Element(kmlNS + "outerBoundaryIs");
if (boundary != null)
{
ESRI.ArcGIS.Client.Geometry.PointCollection pts = ExtractRing(boundary);
if (pts != null && pts.Count > 0)
{
polygon.Rings.Add(pts);
}
}
// Extract holes (if any)
IEnumerable<XElement> holes =
from e in geomElement.Descendants(kmlNS + "innerBoundaryIs")
select e;
foreach (XElement hole in holes)
{
ESRI.ArcGIS.Client.Geometry.PointCollection pts = ExtractRing(hole);
if (pts != null && pts.Count > 0)
{
polygon.Rings.Add(pts);
}
}
// Create symbol and use style information
PolygonSymbolDescriptor sym = new PolygonSymbolDescriptor();
sym.style = kmlStyle;
if (polygon.Rings.Count > 0)
{
// Create feature descriptor from geometry and other information
return new PlacemarkDescriptor()
{
Geometry = polygon,
Symbol = sym
};
}
return null;
}
/// <summary>
/// Extracts a polygon from the input element and applies style information to the placemark descriptor.
/// </summary>
/// <param name="kmlStyle">KML Style information.</param>
/// <param name="geomElement">Polygon geometry information.</param>
/// <returns>A PlacemarkDescriptor object representing the feature.</returns>
private static PlacemarkDescriptor ExtractLatLonBox(KMLStyle kmlStyle, XElement geomElement)
{
XNamespace kmlNS = geomElement.Name.Namespace;
ESRI.ArcGIS.Client.Geometry.Polygon polygon = new Polygon();
double? north = null, south = null, east = null, west = null;
double temp;
XElement boundary;
// Extract box values
boundary = geomElement.Element(kmlNS + "north");
if (boundary != null)
{
if (double.TryParse(boundary.Value, System.Globalization.NumberStyles.Float, CultureInfo.InvariantCulture, out temp))
north = temp;
}
boundary = geomElement.Element(kmlNS + "south");
if (boundary != null)
{
if (double.TryParse(boundary.Value, System.Globalization.NumberStyles.Float, CultureInfo.InvariantCulture, out temp))
south = temp;
}
boundary = geomElement.Element(kmlNS + "east");
if (boundary != null)
{
if (double.TryParse(boundary.Value, System.Globalization.NumberStyles.Float, CultureInfo.InvariantCulture, out temp))
east = temp;
}
boundary = geomElement.Element(kmlNS + "west");
if (boundary != null)
{
if (double.TryParse(boundary.Value, System.Globalization.NumberStyles.Float, CultureInfo.InvariantCulture, out temp))
west = temp;
}
if (north.HasValue && south.HasValue && east.HasValue && west.HasValue)
{
ESRI.ArcGIS.Client.Geometry.PointCollection pts = new PointCollection();
MapPoint mp1 = new MapPoint(west.Value, north.Value);
pts.Add(mp1);
MapPoint mp2 = new MapPoint(east.Value, north.Value);
pts.Add(mp2);
MapPoint mp3 = new MapPoint(east.Value, south.Value);
pts.Add(mp3);
MapPoint mp4 = new MapPoint(west.Value, south.Value);
pts.Add(mp4);
polygon.Rings.Add(pts);
// Create symbol and use style information
PolygonSymbolDescriptor sym = new PolygonSymbolDescriptor();
sym.style = kmlStyle;
// Create feature descriptor from geometry and other information
return new PlacemarkDescriptor()
{
Geometry = polygon,
Symbol = sym
};
}
return null;
}