/// <summary>
/// Convert a multi polygon from one coordinate system to
/// another coordinate system.
/// </summary>
/// <param name="multiPolygon">Multi polygon that should be converted.</param>
/// <param name="fromCoordinateSystem">From coordinate system.</param>
/// <param name="toCoordinateSystem">To coordinate system.</param>
/// <returns>Multi polygon with coordinates according to toCoordinateSystem</returns>
public virtual WebMultiPolygon GetConvertedMultiPolygon(WebMultiPolygon multiPolygon,
WebCoordinateSystem fromCoordinateSystem,
WebCoordinateSystem toCoordinateSystem)
{
Int32 polygonIndex, toPolygonIndex;
WebMultiPolygon toMultiPolygon;
List <WebPolygon> fromPolygons, toPolygons;
toMultiPolygon = null;
if (multiPolygon.IsNotNull())
{
fromPolygons = new List <WebPolygon>();
for (polygonIndex = 0; polygonIndex < multiPolygon.Polygons.Count; polygonIndex++)
{
fromPolygons.Add(multiPolygon.Polygons[polygonIndex]);
}
toPolygons = GetConvertedPolygons(fromPolygons, fromCoordinateSystem, toCoordinateSystem);
toPolygonIndex = 0;
toMultiPolygon = new WebMultiPolygon();
toMultiPolygon.Polygons = new List <WebPolygon>();
for (polygonIndex = 0; polygonIndex < multiPolygon.Polygons.Count; polygonIndex++)
{
toMultiPolygon.Polygons.Add(toPolygons[toPolygonIndex]);
toPolygonIndex++;
}
}
return(toMultiPolygon);
}
/// <summary>
/// Get WebMultiPolygon as a string.
/// </summary>
/// <param name="multiPolygon">This multi polygon.</param>
/// <returns>WebMultiPolygon as a string</returns>
public static String WebToString(this WebMultiPolygon multiPolygon)
{
Boolean isFirstLinearRing, isFirstPolygon;
StringBuilder wkt;
wkt = new StringBuilder();
if (multiPolygon.IsNotNull())
{
wkt.Append("MULTIPOLYGON()");
if (multiPolygon.Polygons.IsNotEmpty())
{
isFirstPolygon = true;
foreach (WebPolygon polygon in multiPolygon.Polygons)
{
if (polygon.LinearRings.IsNotEmpty())
{
if (isFirstPolygon)
{
isFirstPolygon = false;
wkt.Insert(13, "()");
}
else
{
wkt.Insert(13, "(), ");
}
isFirstLinearRing = true;
foreach (WebLinearRing linearRing in polygon.LinearRings)
{
if (linearRing.Points.IsNotEmpty())
{
if (isFirstLinearRing)
{
isFirstLinearRing = false;
wkt.Insert(14, "()");
}
else
{
wkt.Insert(14, "(), ");
}
String komma = String.Empty;
foreach (WebPoint point in linearRing.Points)
{
wkt.Insert(
15,
point.X.WebToStringR().Replace(",", ".") + " "
+ (point.Y.WebToStringR().Replace(",", ".")) + komma);
komma = ", ";
}
}
}
}
}
}
}
return(wkt.ToString());
}
