/// <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>
/// 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>
/// 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>
///
/// </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 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="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>
///
/// </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);
}