/// <summary>
/// Returns a <see cref="T:Topology.CoordinateSystems.AngularUnit" /> given a piece of WKT.
/// </summary>
/// <param name="tokenizer">WktStreamTokenizer that has the WKT.</param>
/// <returns>An object that implements the IUnit interface.</returns>
private static IAngularUnit ReadAngularUnit(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double numericValue = tokenizer.GetNumericValue();
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return new AngularUnit(numericValue, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IGeographicCoordinateSystem ReadGeographicCoordinateSystem(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("DATUM");
IHorizontalDatum horizontalDatum = ReadHorizontalDatum(tokenizer);
tokenizer.ReadToken(",");
tokenizer.ReadToken("PRIMEM");
IPrimeMeridian primeMeridian = ReadPrimeMeridian(tokenizer);
tokenizer.ReadToken(",");
tokenizer.ReadToken("UNIT");
IAngularUnit angularUnit = ReadAngularUnit(tokenizer);
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.NextToken();
List <AxisInfo> axisInfo = new List <AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
axisInfo.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
if (axisInfo.Count == 0)
{
axisInfo.Add(new AxisInfo("Lon", AxisOrientationEnum.East));
axisInfo.Add(new AxisInfo("Lat", AxisOrientationEnum.North));
}
return(new GeographicCoordinateSystem(angularUnit, horizontalDatum, primeMeridian, axisInfo, name, authority, authorityCode, string.Empty, string.Empty, string.Empty));
}
/// <summary>
/// Reads and parses a WKT-formatted projection string.
/// </summary>
/// <param name="wkt">String containing WKT.</param>
/// <returns>Object representation of the WKT.</returns>
/// <exception cref="T:System.ArgumentException">If a token is not recognised.</exception>
public static IInfo Parse(string wkt)
{
IInfo info = null;
StringReader reader = new StringReader(wkt);
WktStreamTokenizer tokenizer = new WktStreamTokenizer(reader);
tokenizer.NextToken();
string stringValue = tokenizer.GetStringValue();
switch (stringValue)
{
case "UNIT":
info = ReadUnit(tokenizer);
break;
case "SPHEROID":
info = ReadEllipsoid(tokenizer);
break;
case "DATUM":
info = ReadHorizontalDatum(tokenizer);
break;
case "PRIMEM":
info = ReadPrimeMeridian(tokenizer);
break;
case "VERT_CS":
case "GEOGCS":
case "PROJCS":
case "COMPD_CS":
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
info = ReadCoordinateSystem(wkt, tokenizer);
break;
default:
throw new ArgumentException(string.Format("'{0'} is not recongnized.", stringValue));
}
reader.Close();
return(info);
}
/// <summary>
/// Returns a <see cref="T:Topology.CoordinateSystems.AngularUnit" /> given a piece of WKT.
/// </summary>
/// <param name="tokenizer">WktStreamTokenizer that has the WKT.</param>
/// <returns>An object that implements the IUnit interface.</returns>
private static IAngularUnit ReadAngularUnit(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double numericValue = tokenizer.GetNumericValue();
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return(new AngularUnit(numericValue, name, authority, authorityCode, string.Empty, string.Empty, string.Empty));
}
/// <summary>
/// Reads and parses a WKT-formatted projection string.
/// </summary>
/// <param name="wkt">String containing WKT.</param>
/// <returns>Object representation of the WKT.</returns>
/// <exception cref="T:System.ArgumentException">If a token is not recognised.</exception>
public static IInfo Parse(string wkt)
{
IInfo info = null;
StringReader reader = new StringReader(wkt);
WktStreamTokenizer tokenizer = new WktStreamTokenizer(reader);
tokenizer.NextToken();
string stringValue = tokenizer.GetStringValue();
switch (stringValue)
{
case "UNIT":
info = ReadUnit(tokenizer);
break;
case "SPHEROID":
info = ReadEllipsoid(tokenizer);
break;
case "DATUM":
info = ReadHorizontalDatum(tokenizer);
break;
case "PRIMEM":
info = ReadPrimeMeridian(tokenizer);
break;
case "VERT_CS":
case "GEOGCS":
case "PROJCS":
case "COMPD_CS":
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
info = ReadCoordinateSystem(wkt, tokenizer);
break;
default:
throw new ArgumentException(string.Format("'{0'} is not recongnized.", stringValue));
}
reader.Close();
return info;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjectedCoordinateSystem ReadProjectedCoordinateSystem(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("GEOGCS");
IGeographicCoordinateSystem geographicCoordinateSystem = ReadGeographicCoordinateSystem(tokenizer);
tokenizer.ReadToken(",");
IProjection projection = ReadProjection(tokenizer);
IUnit unit = ReadLinearUnit(tokenizer);
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.NextToken();
List <AxisInfo> axisInfo = new List <AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
axisInfo.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
if (axisInfo.Count == 0)
{
axisInfo.Add(new AxisInfo("X", AxisOrientationEnum.East));
axisInfo.Add(new AxisInfo("Y", AxisOrientationEnum.North));
}
return(new ProjectedCoordinateSystem(geographicCoordinateSystem.HorizontalDatum, geographicCoordinateSystem, unit as LinearUnit, projection, axisInfo, name, authority, authorityCode, string.Empty, string.Empty, string.Empty));
}
/// <summary>
/// Returns a <see cref="T:Topology.CoordinateSystems.AxisInfo" /> given a piece of WKT.
/// </summary>
/// <param name="tokenizer">WktStreamTokenizer that has the WKT.</param>
/// <returns>An AxisInfo object.</returns>
private static AxisInfo ReadAxis(WktStreamTokenizer tokenizer)
{
if (tokenizer.GetStringValue() != "AXIS")
{
tokenizer.ReadToken("AXIS");
}
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
string stringValue = tokenizer.GetStringValue();
tokenizer.ReadToken("]");
switch (stringValue.ToUpper())
{
case "DOWN":
return(new AxisInfo(name, AxisOrientationEnum.Down));
case "EAST":
return(new AxisInfo(name, AxisOrientationEnum.East));
case "NORTH":
return(new AxisInfo(name, AxisOrientationEnum.North));
case "OTHER":
return(new AxisInfo(name, AxisOrientationEnum.Other));
case "SOUTH":
return(new AxisInfo(name, AxisOrientationEnum.South));
case "UP":
return(new AxisInfo(name, AxisOrientationEnum.Up));
case "WEST":
return(new AxisInfo(name, AxisOrientationEnum.West));
}
throw new ArgumentException("Invalid axis name '" + stringValue + "' in WKT");
}
/// <summary>
/// Reads either 3, 6 or 7 parameter Bursa-Wolf values from TOWGS84 token
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static Wgs84ConversionInfo ReadWGS84ConversionInfo(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
Wgs84ConversionInfo info = new Wgs84ConversionInfo();
tokenizer.NextToken();
info.Dx = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Dy = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Dz = tokenizer.GetNumericValue();
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
info.Ex = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ey = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ez = tokenizer.GetNumericValue();
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
info.Ppm = tokenizer.GetNumericValue();
}
}
if (tokenizer.GetStringValue() != "]")
{
tokenizer.ReadToken("]");
}
return(info);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IEllipsoid ReadEllipsoid(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double numericValue = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double inverseFlattening = tokenizer.GetNumericValue();
tokenizer.NextToken();
string authority = string.Empty;
long authorityCode = -1L;
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return(new Ellipsoid(numericValue, 0, inverseFlattening, true, LinearUnit.Metre, name, authority, authorityCode, string.Empty, string.Empty, string.Empty));
}
/// <summary>
///
/// </summary>
/// <param name="coordinateSystem"></param>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static ICoordinateSystem ReadCoordinateSystem(string coordinateSystem, WktStreamTokenizer tokenizer)
{
switch (tokenizer.GetStringValue())
{
case "GEOGCS":
return(ReadGeographicCoordinateSystem(tokenizer));
case "PROJCS":
return(ReadProjectedCoordinateSystem(tokenizer));
case "COMPD_CS":
case "VERT_CS":
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
throw new NotSupportedException(string.Format("{0} coordinate system is not supported.", coordinateSystem));
}
throw new InvalidOperationException(string.Format("{0} coordinate system is not recognized.", coordinateSystem));
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IEllipsoid ReadEllipsoid(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double numericValue = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double inverseFlattening = tokenizer.GetNumericValue();
tokenizer.NextToken();
string authority = string.Empty;
long authorityCode = -1L;
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return new Ellipsoid(numericValue, 0, inverseFlattening, true, LinearUnit.Metre, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
}
/// <summary>
/// Reads either 3, 6 or 7 parameter Bursa-Wolf values from TOWGS84 token
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static Wgs84ConversionInfo ReadWGS84ConversionInfo(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
Wgs84ConversionInfo info = new Wgs84ConversionInfo();
tokenizer.NextToken();
info.Dx = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Dy = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Dz = tokenizer.GetNumericValue();
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
info.Ex = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ey = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ez = tokenizer.GetNumericValue();
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
info.Ppm = tokenizer.GetNumericValue();
}
}
if (tokenizer.GetStringValue() != "]")
{
tokenizer.ReadToken("]");
}
return info;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjection ReadProjection(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("PROJECTION");
tokenizer.ReadToken("[");
string className = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
tokenizer.ReadToken("PARAMETER");
List<ProjectionParameter> parameters = new List<ProjectionParameter>();
while (tokenizer.GetStringValue() == "PARAMETER")
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double numericValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
parameters.Add(new ProjectionParameter(name, numericValue));
tokenizer.NextToken();
}
string authority = string.Empty;
return new Projection(className, parameters, className, authority, -1L, string.Empty, string.Empty, string.Empty);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjectedCoordinateSystem ReadProjectedCoordinateSystem(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("GEOGCS");
IGeographicCoordinateSystem geographicCoordinateSystem = ReadGeographicCoordinateSystem(tokenizer);
tokenizer.ReadToken(",");
IProjection projection = ReadProjection(tokenizer);
IUnit unit = ReadLinearUnit(tokenizer);
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.NextToken();
List<AxisInfo> axisInfo = new List<AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
axisInfo.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
if (axisInfo.Count == 0)
{
axisInfo.Add(new AxisInfo("X", AxisOrientationEnum.East));
axisInfo.Add(new AxisInfo("Y", AxisOrientationEnum.North));
}
return new ProjectedCoordinateSystem(geographicCoordinateSystem.HorizontalDatum, geographicCoordinateSystem, unit as LinearUnit, projection, axisInfo, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IHorizontalDatum ReadHorizontalDatum(WktStreamTokenizer tokenizer)
{
Wgs84ConversionInfo info = null;
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("SPHEROID");
IEllipsoid ellipsoid = ReadEllipsoid(tokenizer);
tokenizer.NextToken();
while (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
if (tokenizer.GetStringValue() == "TOWGS84")
{
info = ReadWGS84ConversionInfo(tokenizer);
tokenizer.NextToken();
}
else if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
return new HorizontalDatum(ellipsoid, info, DatumType.HD_Geocentric, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IGeographicCoordinateSystem ReadGeographicCoordinateSystem(WktStreamTokenizer tokenizer)
{
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("DATUM");
IHorizontalDatum horizontalDatum = ReadHorizontalDatum(tokenizer);
tokenizer.ReadToken(",");
tokenizer.ReadToken("PRIMEM");
IPrimeMeridian primeMeridian = ReadPrimeMeridian(tokenizer);
tokenizer.ReadToken(",");
tokenizer.ReadToken("UNIT");
IAngularUnit angularUnit = ReadAngularUnit(tokenizer);
string authority = string.Empty;
long authorityCode = -1L;
tokenizer.NextToken();
List<AxisInfo> axisInfo = new List<AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
axisInfo.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
if (axisInfo.Count == 0)
{
axisInfo.Add(new AxisInfo("Lon", AxisOrientationEnum.East));
axisInfo.Add(new AxisInfo("Lat", AxisOrientationEnum.North));
}
return new GeographicCoordinateSystem(angularUnit, horizontalDatum, primeMeridian, axisInfo, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
}
/// <summary>
/// Returns a <see cref="T:Topology.CoordinateSystems.AxisInfo" /> given a piece of WKT.
/// </summary>
/// <param name="tokenizer">WktStreamTokenizer that has the WKT.</param>
/// <returns>An AxisInfo object.</returns>
private static AxisInfo ReadAxis(WktStreamTokenizer tokenizer)
{
if (tokenizer.GetStringValue() != "AXIS")
{
tokenizer.ReadToken("AXIS");
}
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
string stringValue = tokenizer.GetStringValue();
tokenizer.ReadToken("]");
switch (stringValue.ToUpper())
{
case "DOWN":
return new AxisInfo(name, AxisOrientationEnum.Down);
case "EAST":
return new AxisInfo(name, AxisOrientationEnum.East);
case "NORTH":
return new AxisInfo(name, AxisOrientationEnum.North);
case "OTHER":
return new AxisInfo(name, AxisOrientationEnum.Other);
case "SOUTH":
return new AxisInfo(name, AxisOrientationEnum.South);
case "UP":
return new AxisInfo(name, AxisOrientationEnum.Up);
case "WEST":
return new AxisInfo(name, AxisOrientationEnum.West);
}
throw new ArgumentException("Invalid axis name '" + stringValue + "' in WKT");
}
/// <summary>
///
/// </summary>
/// <param name="coordinateSystem"></param>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static ICoordinateSystem ReadCoordinateSystem(string coordinateSystem, WktStreamTokenizer tokenizer)
{
switch (tokenizer.GetStringValue())
{
case "GEOGCS":
return ReadGeographicCoordinateSystem(tokenizer);
case "PROJCS":
return ReadProjectedCoordinateSystem(tokenizer);
case "COMPD_CS":
case "VERT_CS":
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
throw new NotSupportedException(string.Format("{0} coordinate system is not supported.", coordinateSystem));
}
throw new InvalidOperationException(string.Format("{0} coordinate system is not recognized.", coordinateSystem));
}