/// <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 multi polygon from SqlGeometry.
/// </summary>
/// <param name="geometryMultiPolygon">Multi polygon geometry.</param>
/// <returns>Multi polygon.</returns>
public static WebMultiPolygon GetMultiPolygon(this SqlGeometry geometryMultiPolygon)
{
Int32 polygonIndex;
SqlGeometry geometryPolygon;
WebMultiPolygon multiPolygon;
multiPolygon = new WebMultiPolygon();
multiPolygon.Polygons = new List <WebPolygon>();
switch (geometryMultiPolygon.GetGeometryType())
{
case SqlGeometryType.Polygon:
geometryPolygon = geometryMultiPolygon;
multiPolygon.Polygons.Add(GetPolygon(geometryPolygon));
break;
case SqlGeometryType.MultiPolygon:
for (polygonIndex = 1; polygonIndex <= geometryMultiPolygon.STNumGeometries(); polygonIndex++)
{
geometryPolygon = geometryMultiPolygon.STGeometryN(polygonIndex);
if (geometryPolygon.GetGeometryType() == SqlGeometryType.Polygon)
{
multiPolygon.Polygons.Add(GetPolygon(geometryPolygon));
}
else
{
throw new Exception("Wrong geometry data type in GetMultiPolygon. Expected type 'Polygon', actual type : " + geometryPolygon.GetGeometryType().ToString());
}
}
break;
default:
throw new Exception("Wrong geometry data type in GetPolygon. Expected type 'Polygon' or 'MultiPolygon', actual type : " + geometryMultiPolygon.GetGeometryType().ToString());
}
return(multiPolygon);
}
/// <summary>
/// Get a SqlGeometry instance with same
/// information as provided WebMultiPolygon.
/// </summary>
/// <param name="multiPolygon">This multi polygon.</param>
/// <returns>
/// A SqlGeometry instance with same
/// information as provided WebMultiPolygon.
/// </returns>
public static SqlGeometry GetGeometry(this WebMultiPolygon multiPolygon)
{
StringBuilder wkt = GetGeometryWkt(multiPolygon);
try
{
return(SqlGeometry.Parse(new SqlString(wkt.ToString())));
}
catch (Exception)
{
// Debug.WriteLine("SqlGeometry Error in Parse return NULL.");
}
return(null);
}
/// <summary>
/// Get bounding box for provided polygon.
/// Currently only 2 dimensions are handled.
/// </summary>
/// <param name="multiPolygon">This polygon.</param>
/// <returns>Bounding box for provided polygon.</returns>
public static WebBoundingBox GetBoundingBox(this WebMultiPolygon multiPolygon)
{
WebBoundingBox boundingBox;
boundingBox = null;
if (multiPolygon.Polygons.IsNotEmpty())
{
foreach (WebPolygon polygon in multiPolygon.Polygons)
{
if (boundingBox.IsNull())
{
boundingBox = polygon.GetBoundingBox();
}
else
{
boundingBox.Add(polygon.GetBoundingBox());
}
}
}
return(boundingBox);
}
/// <summary>
/// Get a SqlGeography instance with same
/// information as provided WebMultiPolygon.
/// </summary>
/// <param name="multiPolygon">This multi polygon.</param>
/// <returns>
/// A SqlGeography instance with same
/// information as provided WebMultiPolygon.
/// </returns>
public static SqlGeography GetGeography(this WebMultiPolygon multiPolygon)
{
Boolean isFirstLinearRing, isFirstPoint, isFirstPolygon;
StringBuilder wkt;
wkt = new StringBuilder("MULTIPOLYGON()");
try
{
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(SqlGeography.Parse(new SqlString(wkt.ToString())));
}
catch (Exception)
{
// Debug.WriteLine("Parse did not work, try other direction...");
}
wkt = new StringBuilder("MULTIPOLYGON");
wkt.Append("(");
try
{
if (multiPolygon.Polygons.IsNotEmpty())
{
isFirstPolygon = true;
foreach (WebPolygon polygon in multiPolygon.Polygons)
{
if (isFirstPolygon)
{
isFirstPolygon = false;
}
else
{
wkt.Append(", ");
}
wkt.Append("(");
if (polygon.LinearRings.IsNotEmpty())
{
isFirstLinearRing = true;
foreach (WebLinearRing linearRing in polygon.LinearRings)
{
if (isFirstLinearRing)
{
isFirstLinearRing = false;
}
else
{
wkt.Append(", ");
}
wkt.Append("(");
if (linearRing.Points.IsNotEmpty())
{
isFirstPoint = true;
foreach (WebPoint point in linearRing.Points)
{
if (isFirstPoint)
{
isFirstPoint = false;
}
else
{
wkt.Append(", ");
}
wkt.Append(point.X.WebToStringR().Replace(",", ".") + " " + (point.Y.WebToStringR().Replace(",", ".")));
}
}
wkt.Append(")");
}
}
wkt.Append(")");
}
}
wkt.Append(")");
return(SqlGeography.Parse(new SqlString(wkt.ToString())));
}
catch (Exception)
{
// Debug.WriteLine("Parse did not work in this direction either...");
}
Debug.WriteLine("SqlGeography, no parse possibel, return NULL");
return(null);
}
/// <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());
}
/// <summary>
/// Gets a string instance with same
/// information (wkt) as provided WebMultiPolygon
/// </summary>
/// <param name="multiPolygon">This multi polygon.</param>
/// <returns>A string instance with same
/// information as provided WebMultiPolygon.
/// </returns>
public static StringBuilder GetGeometryWkt(WebMultiPolygon multiPolygon)
{
StringBuilder wkt;
Boolean isFirstLinearRing, isFirstPoint, isFirstPolygon;
wkt = new StringBuilder("MULTIPOLYGON");
wkt.Append("(");
if (multiPolygon.Polygons.IsNotEmpty())
{
isFirstPolygon = true;
foreach (WebPolygon polygon in multiPolygon.Polygons)
{
if (isFirstPolygon)
{
isFirstPolygon = false;
}
else
{
wkt.Append(", ");
}
wkt.Append("(");
if (polygon.LinearRings.IsNotEmpty())
{
isFirstLinearRing = true;
foreach (WebLinearRing linearRing in polygon.LinearRings)
{
if (isFirstLinearRing)
{
isFirstLinearRing = false;
}
else
{
wkt.Append(", ");
}
wkt.Append("(");
if (linearRing.Points.IsNotEmpty())
{
isFirstPoint = true;
foreach (WebPoint point in linearRing.Points)
{
if (isFirstPoint)
{
isFirstPoint = false;
}
else
{
wkt.Append(", ");
}
wkt.Append(point.X.WebToStringR().Replace(",", "."));
wkt.Append(" " + point.Y.WebToStringR().Replace(",", "."));
}
}
wkt.Append(")");
}
}
wkt.Append(")");
}
}
wkt.Append(")");
return(wkt);
}
