/// <summary>
/// Returns a <see cref="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 axisName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
string unitname = tokenizer.GetStringValue();
tokenizer.ReadToken("]");
switch (unitname.ToUpper(CultureInfo.InvariantCulture))
{
case "DOWN": return(new AxisInfo(axisName, AxisOrientationEnum.Down));
case "EAST": return(new AxisInfo(axisName, AxisOrientationEnum.East));
case "NORTH": return(new AxisInfo(axisName, AxisOrientationEnum.North));
case "OTHER": return(new AxisInfo(axisName, AxisOrientationEnum.Other));
case "SOUTH": return(new AxisInfo(axisName, AxisOrientationEnum.South));
case "UP": return(new AxisInfo(axisName, AxisOrientationEnum.Up));
case "WEST": return(new AxisInfo(axisName, AxisOrientationEnum.West));
default:
throw new ArgumentException("Invalid axis name '" + unitname + "' in WKT");
}
}
private static IParameterInfo ReadParameters(WktStreamTokenizer tokenizer)
{
List <GeoAPI.CoordinateSystems.Parameter> paramList = new List <GeoAPI.CoordinateSystems.Parameter> ();
while (tokenizer.GetStringValue() == "PARAMETER")
{
tokenizer.ReadToken("[");
string paramName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double paramValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
//test, whether next parameter is delimited by comma
tokenizer.NextToken();
if (tokenizer.GetStringValue() != "]")
{
tokenizer.NextToken();
}
paramList.Add(new GeoAPI.CoordinateSystems.Parameter(paramName, paramValue));
}
IParameterInfo info = new ParameterInfo()
{
Parameters = paramList
};
return(info);
}
/*
* /// <summary>
* ///
* /// </summary>
* /// <param name="tokenizer"></param>
* /// <returns></returns>
* private static ICompoundCoordinateSystem ReadCompoundCoordinateSystem(WktStreamTokenizer tokenizer)
* {
*
* //COMPD_CS[
* //"OSGB36 / British National Grid + ODN",
* //PROJCS[]
* //VERT_CS[]
* //AUTHORITY["EPSG","7405"]
* //]
*
* tokenizer.ReadToken("[");
* string name=tokenizer.ReadDoubleQuotedWord();
* tokenizer.ReadToken(",");
* tokenizer.NextToken();
* string headCSCode = tokenizer.GetStringValue();
* ICoordinateSystem headCS = ReadCoordinateSystem(headCSCode,tokenizer);
* tokenizer.ReadToken(",");
* tokenizer.NextToken();
* string tailCSCode = tokenizer.GetStringValue();
* ICoordinateSystem tailCS = ReadCoordinateSystem(tailCSCode,tokenizer);
* tokenizer.ReadToken(",");
* string authority=String.Empty;
* string authorityCode=String.Empty;
* tokenizer.ReadAuthority(ref authority, ref authorityCode);
* tokenizer.ReadToken("]");
* ICompoundCoordinateSystem compoundCS = new CompoundCoordinateSystem(headCS,tailCS,String.Empty,authority,authorityCode,name,String.Empty,String.Empty);
* return compoundCS;
*
* }*/
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IEllipsoid ReadEllipsoid(WktStreamTokenizer tokenizer)
{
//SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]]
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double majorAxis = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double e = tokenizer.GetNumericValue();
//
//tokenizer.ReadToken(",");
tokenizer.NextToken();
string authority = String.Empty;
long authorityCode = -1;
if (tokenizer.GetStringValue() == ",") //Read authority
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
IEllipsoid ellipsoid = new Ellipsoid(majorAxis, 0.0, e, true, LinearUnit.Metre, name, authority, authorityCode, String.Empty, string.Empty, string.Empty);
return(ellipsoid);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IHorizontalDatum ReadHorizontalDatum(WktStreamTokenizer tokenizer)
{
//DATUM["OSGB 1936",SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6277"]]
Wgs84ConversionInfo wgsInfo = null;
string authority = String.Empty;
long authorityCode = -1;
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")
{
wgsInfo = ReadWGS84ConversionInfo(tokenizer);
tokenizer.NextToken();
}
else if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
// make an assumption about the datum type.
IHorizontalDatum horizontalDatum = new HorizontalDatum(ellipsoid, wgsInfo, DatumType.HD_Geocentric, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return(horizontalDatum);
}
/// <summary>
/// Returns a <see cref="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("[");
tokenizer.NextToken();
string unitName = "";
if (tokenizer.GetStringValue() == ",")//徐辉修改，环境星数据在unit这项中，没有degree这个参数
{
unitName = "degree";
}
else
{
tokenizer.NextToken();
unitName = tokenizer.GetStringValue();
tokenizer.NextToken();
tokenizer.NextToken();
}
//unitName = tokenizer.ReadDoubleQuotedWord();
//tokenizer.ReadToken(",");
tokenizer.NextToken();
double unitsPerUnit = tokenizer.GetNumericValue();
string authority = String.Empty;
long authorityCode = -1;
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return(new AngularUnit(unitsPerUnit, unitName, authority, authorityCode, String.Empty, String.Empty, String.Empty));
}
private static IFittedCoordinateSystem ReadFittedCoordinateSystem(WktStreamTokenizer tokenizer)
{
/*
* FITTED_CS[
* "Local coordinate system MNAU (based on Gauss-Krueger)",
* PARAM_MT[
* "Affine",
* PARAMETER["num_row",3],
* PARAMETER["num_col",3],
* PARAMETER["elt_0_0", 0.883485346527455],
* PARAMETER["elt_0_1", -0.468458794848877],
* PARAMETER["elt_0_2", 3455869.17937689],
* PARAMETER["elt_1_0", 0.468458794848877],
* PARAMETER["elt_1_1", 0.883485346527455],
* PARAMETER["elt_1_2", 5478710.88035753],
* PARAMETER["elt_2_2", 1],
* ],
* PROJCS["DHDN / Gauss-Kruger zone 3", GEOGCS["DHDN", DATUM["Deutsches_Hauptdreiecksnetz", SPHEROID["Bessel 1841", 6377397.155, 299.1528128, AUTHORITY["EPSG", "7004"]], TOWGS84[612.4, 77, 440.2, -0.054, 0.057, -2.797, 0.525975255930096], AUTHORITY["EPSG", "6314"]], PRIMEM["Greenwich", 0, AUTHORITY["EPSG", "8901"]], UNIT["degree", 0.0174532925199433, AUTHORITY["EPSG", "9122"]], AUTHORITY["EPSG", "4314"]], UNIT["metre", 1, AUTHORITY["EPSG", "9001"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin", 0], PARAMETER["central_meridian", 9], PARAMETER["scale_factor", 1], PARAMETER["false_easting", 3500000], PARAMETER["false_northing", 0], AUTHORITY["EPSG", "31467"]]
* AUTHORITY["CUSTOM","12345"]
* ]
*/
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("PARAM_MT");
IMathTransform toBaseTransform = MathTransformWktReader.ReadMathTransform(tokenizer);
tokenizer.ReadToken(",");
tokenizer.NextToken();
ICoordinateSystem baseCS = ReadCoordinateSystem(null, tokenizer);
string authority = String.Empty;
long authorityCode = -1;
TokenType ct = tokenizer.NextToken();
while (ct != TokenType.Eol && ct != TokenType.Eof)
{
switch (tokenizer.GetStringValue())
{
case ",":
case "]":
break;
case "AUTHORITY":
tokenizer.ReadAuthority(ref authority, ref authorityCode);
//tokenizer.ReadToken("]");
break;
}
ct = tokenizer.NextToken();
}
IFittedCoordinateSystem fittedCS = new FittedCoordinateSystem(baseCS, toBaseTransform, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
return(fittedCS);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjection ReadProjection(WktStreamTokenizer tokenizer)
{
//tokenizer.NextToken();// PROJECTION
tokenizer.ReadToken("PROJECTION");
tokenizer.ReadToken("["); //[
string projectionName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken("]"); //]
tokenizer.ReadToken(","); //,
tokenizer.ReadToken("PARAMETER");
List <ProjectionParameter> paramList = new List <ProjectionParameter>();
while (tokenizer.GetStringValue() == "PARAMETER")
{
tokenizer.ReadToken("[");
string paramName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double paramValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
paramList.Add(new ProjectionParameter(paramName, paramValue));
tokenizer.NextToken();
}
string authority = String.Empty;
long authorityCode = -1;
IProjection projection = new Projection(projectionName, paramList, projectionName, authority, authorityCode, String.Empty, String.Empty, string.Empty);
return(projection);
}
/*
* /// <summary>
* ///
* /// </summary>
* /// <param name="tokenizer"></param>
* /// <returns></returns>
* private static ICompoundCoordinateSystem ReadCompoundCoordinateSystem(WktStreamTokenizer tokenizer)
* {
*
* //COMPD_CS[
* //"OSGB36 / British National Grid + ODN",
* //PROJCS[]
* //VERT_CS[]
* //AUTHORITY["EPSG","7405"]
* //]
*
* tokenizer.ReadToken("[");
* string name=tokenizer.ReadDoubleQuotedWord();
* tokenizer.ReadToken(",");
* tokenizer.NextToken();
* string headCSCode = tokenizer.GetStringValue();
* ICoordinateSystem headCS = ReadCoordinateSystem(headCSCode,tokenizer);
* tokenizer.ReadToken(",");
* tokenizer.NextToken();
* string tailCSCode = tokenizer.GetStringValue();
* ICoordinateSystem tailCS = ReadCoordinateSystem(tailCSCode,tokenizer);
* tokenizer.ReadToken(",");
* string authority=String.Empty;
* string authorityCode=String.Empty;
* tokenizer.ReadAuthority(ref authority, ref authorityCode);
* tokenizer.ReadToken("]");
* ICompoundCoordinateSystem compoundCS = new CompoundCoordinateSystem(headCS,tailCS,String.Empty,authority,authorityCode,name,String.Empty,String.Empty);
* return compoundCS;
*
* }*/
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IEllipsoid ReadEllipsoid(WktStreamTokenizer tokenizer)
{
//SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]]
IEllipsoid ellipsoid = null;
string name = "";
double majorAxis = 0.0;
double e = 0.0;
string authority = "";
long authorityCode = -1;
string scienceValue = "";
tokenizer.ReadToken("[");
name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
majorAxis = tokenizer.GetNumericValue();
tokenizer.NextToken();
if (tokenizer.GetStringValue() == "e")//徐辉修订，判断读出来的是否是科学计数法的值
{
tokenizer.NextToken();
scienceValue = majorAxis.ToString() + "e" + tokenizer.GetNumericValue().ToString();
majorAxis = Double.Parse(scienceValue, System.Globalization.NumberStyles.Float);
tokenizer.ReadToken(",");
}
tokenizer.NextToken();
e = tokenizer.GetNumericValue();
tokenizer.NextToken();
if (tokenizer.GetStringValue() == "e")
{
tokenizer.NextToken();
scienceValue = e.ToString() + "e" + tokenizer.GetNumericValue().ToString();
e = Double.Parse(scienceValue, System.Globalization.NumberStyles.Float);
tokenizer.ReadToken(",");
}
authority = String.Empty;
if (tokenizer.GetStringValue() == ",") //Read authority
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
ellipsoid = new Ellipsoid(majorAxis, 0.0, e, true, LinearUnit.Metre, name, authority, authorityCode, String.Empty, string.Empty, string.Empty);
return(ellipsoid);
}
/// <summary>
/// Returns a <see cref="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 unitName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double unitsPerUnit = tokenizer.GetNumericValue();
string authority = String.Empty;
long authorityCode = -1;
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return(new AngularUnit(unitsPerUnit, unitName, authority, authorityCode, String.Empty, String.Empty, String.Empty));
}
/// <summary>
/// Reads math transform from using current token from the specified tokenizer
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
internal static IMathTransform ReadMathTransform(WktStreamTokenizer tokenizer)
{
if (tokenizer.GetStringValue() != "PARAM_MT")
{
tokenizer.ReadToken("PARAM_MT");
}
tokenizer.ReadToken("[");
string transformName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
switch (transformName.ToUpperInvariant())
{
case "AFFINE":
return(ReadAffineTransform(tokenizer));
default:
throw new NotSupportedException("Transform not supported '" + transformName + "'");
}
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IPrimeMeridian ReadPrimeMeridian(WktStreamTokenizer tokenizer)
{
//PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]]
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double longitude = tokenizer.GetNumericValue();
tokenizer.NextToken();
string authority = String.Empty;
long authorityCode = -1;
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
// make an assumption about the Angular units - degrees.
IPrimeMeridian primeMeridian = new PrimeMeridian(longitude, AngularUnit.Degrees, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return(primeMeridian);
}
/// <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)
{
//TOWGS84[0,0,0,0,0,0,0]
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 IGeographicCoordinateSystem ReadGeographicCoordinateSystem(WktStreamTokenizer tokenizer)
{
/*
* GEOGCS["OSGB 1936",
* DATUM["OSGB 1936",SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6277"]]
* PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]]
* AXIS["Geodetic latitude","NORTH"]
* AXIS["Geodetic longitude","EAST"]
* AUTHORITY["EPSG","4277"]
* ]
*/
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 = -1;
tokenizer.NextToken();
List <AxisInfo> info = new List <AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
info.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
}
}
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
//This is default axis values if not specified.
if (info.Count == 0)
{
info.Add(new AxisInfo("Lon", AxisOrientationEnum.East));
info.Add(new AxisInfo("Lat", AxisOrientationEnum.North));
}
IGeographicCoordinateSystem geographicCS = new GeographicCoordinateSystem(angularUnit, horizontalDatum,
primeMeridian, info, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return(geographicCS);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjectedCoordinateSystem ReadProjectedCoordinateSystem(WktStreamTokenizer tokenizer)
{
/*PROJCS[
* "OSGB 1936 / British National Grid",
* GEOGCS[
* "OSGB 1936",
* DATUM[...]
* PRIMEM[...]
* AXIS["Geodetic latitude","NORTH"]
* AXIS["Geodetic longitude","EAST"]
* AUTHORITY["EPSG","4277"]
* ],
* PROJECTION["Transverse Mercator"],
* PARAMETER["latitude_of_natural_origin",49],
* PARAMETER["longitude_of_natural_origin",-2],
* PARAMETER["scale_factor_at_natural_origin",0.999601272],
* PARAMETER["false_easting",400000],
* PARAMETER["false_northing",-100000],
* AXIS["Easting","EAST"],
* AXIS["Northing","NORTH"],
* AUTHORITY["EPSG","27700"]
* ]
*/
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("GEOGCS");
IGeographicCoordinateSystem geographicCS = ReadGeographicCoordinateSystem(tokenizer);
tokenizer.ReadToken(",");
IProjection projection = ReadProjection(tokenizer);
IUnit unit = ReadLinearUnit(tokenizer);
string authority = String.Empty;
long authorityCode = -1;
tokenizer.NextToken();
List <AxisInfo> axes = new List <AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
axes.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
}
}
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
//This is default axis values if not specified.
if (axes.Count == 0)
{
axes.Add(new AxisInfo("X", AxisOrientationEnum.East));
axes.Add(new AxisInfo("Y", AxisOrientationEnum.North));
}
IProjectedCoordinateSystem projectedCS = new ProjectedCoordinateSystem(geographicCS.HorizontalDatum, geographicCS, unit as LinearUnit, projection, axes, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return(projectedCS);
}
private static IParameterInfo ReadParameters (WktStreamTokenizer tokenizer)
{
List<GeoAPI.CoordinateSystems.Parameter> paramList = new List<GeoAPI.CoordinateSystems.Parameter> ();
while (tokenizer.GetStringValue () == "PARAMETER")
{
tokenizer.ReadToken ("[");
string paramName = tokenizer.ReadDoubleQuotedWord ();
tokenizer.ReadToken (",");
tokenizer.NextToken ();
double paramValue = tokenizer.GetNumericValue ();
tokenizer.ReadToken ("]");
//test, whether next parameter is delimited by comma
tokenizer.NextToken ();
if (tokenizer.GetStringValue () != "]")
tokenizer.NextToken ();
paramList.Add (new GeoAPI.CoordinateSystems.Parameter (paramName, paramValue));
}
IParameterInfo info = new ParameterInfo () { Parameters = paramList };
return info;
}
private static IMathTransform ReadAffineTransform (WktStreamTokenizer tokenizer)
{
/*
PARAM_MT[
"Affine",
PARAMETER["num_row",3],
PARAMETER["num_col",3],
PARAMETER["elt_0_0", 0.883485346527455],
PARAMETER["elt_0_1", -0.468458794848877],
PARAMETER["elt_0_2", 3455869.17937689],
PARAMETER["elt_1_0", 0.468458794848877],
PARAMETER["elt_1_1", 0.883485346527455],
PARAMETER["elt_1_2", 5478710.88035753],
PARAMETER["elt_2_2", 1]
]
*/
//tokenizer stands on the first PARAMETER
if (tokenizer.GetStringValue () != "PARAMETER")
tokenizer.ReadToken ("PARAMETER");
IParameterInfo paramInfo = ReadParameters (tokenizer);
//manage required parameters - row, col
var rowParam = paramInfo.GetParameterByName ("num_row");
var colParam = paramInfo.GetParameterByName ("num_col");
if (rowParam == null)
{
throw new ArgumentNullException ("Affine transform does not contain 'num_row' parameter");
}
if (colParam == null)
{
throw new ArgumentNullException ("Affine transform does not contain 'num_col' parameter");
}
int rowVal = (int)rowParam.Value;
int colVal = (int)colParam.Value;
if (rowVal <= 0)
{
throw new ArgumentException ("Affine transform contains invalid value of 'num_row' parameter");
}
if (colVal <= 0)
{
throw new ArgumentException ("Affine transform contains invalid value of 'num_col' parameter");
}
//creates working matrix;
double[,] matrix = new double[rowVal, colVal];
//simply process matrix values - no elt_ROW_COL parsing
foreach (var param in paramInfo.Parameters)
{
if (param == null || param.Name == null)
{
continue;
}
switch (param.Name)
{
case "num_row":
case "num_col":
break;
case "elt_0_0":
matrix[0, 0] = param.Value;
break;
case "elt_0_1":
matrix[0, 1] = param.Value;
break;
case "elt_0_2":
matrix[0, 2] = param.Value;
break;
case "elt_0_3":
matrix[0, 3] = param.Value;
break;
case "elt_1_0":
matrix[1, 0] = param.Value;
break;
case "elt_1_1":
matrix[1, 1] = param.Value;
break;
case "elt_1_2":
matrix[1, 2] = param.Value;
break;
case "elt_1_3":
matrix[1, 3] = param.Value;
break;
case "elt_2_0":
matrix[2, 0] = param.Value;
break;
case "elt_2_1":
matrix[2, 1] = param.Value;
break;
case "elt_2_2":
matrix[2, 2] = param.Value;
break;
case "elt_2_3":
matrix[2, 3] = param.Value;
break;
case "elt_3_0":
matrix[3, 0] = param.Value;
break;
case "elt_3_1":
matrix[3, 1] = param.Value;
break;
case "elt_3_2":
matrix[3, 2] = param.Value;
break;
case "elt_3_3":
matrix[3, 3] = param.Value;
break;
default:
//unknown parameter
break;
}
}
//read rest of WKT
if (tokenizer.GetStringValue () != "]")
tokenizer.ReadToken ("]");
//use "matrix" constructor to create transformation matrix
IMathTransform affineTransform = new AffineTransform (matrix);
return affineTransform;
}
/// <summary>
/// Returns a <see cref="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 axisName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
string unitname = tokenizer.GetStringValue();
tokenizer.ReadToken("]");
switch (unitname.ToUpperInvariant())
{
case "DOWN": return new AxisInfo(axisName, AxisOrientationEnum.Down);
case "EAST": return new AxisInfo(axisName, AxisOrientationEnum.East);
case "NORTH": return new AxisInfo(axisName, AxisOrientationEnum.North);
case "OTHER": return new AxisInfo(axisName, AxisOrientationEnum.Other);
case "SOUTH": return new AxisInfo(axisName, AxisOrientationEnum.South);
case "UP": return new AxisInfo(axisName, AxisOrientationEnum.Up);
case "WEST": return new AxisInfo(axisName, AxisOrientationEnum.West);
default:
throw new ArgumentException("Invalid axis name '" + unitname + "' in WKT");
}
}
/// <summary>
/// Reads math transform from using current token from the specified tokenizer
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
internal static IMathTransform ReadMathTransform (WktStreamTokenizer tokenizer)
{
if (tokenizer.GetStringValue () != "PARAM_MT")
tokenizer.ReadToken ("PARAM_MT");
tokenizer.ReadToken ("[");
string transformName = tokenizer.ReadDoubleQuotedWord ();
tokenizer.ReadToken (",");
switch (transformName.ToUpperInvariant ())
{
case "AFFINE":
return ReadAffineTransform (tokenizer);
default:
throw new NotSupportedException ("Transform not supported '" + transformName + "'");
}
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IHorizontalDatum ReadHorizontalDatum(WktStreamTokenizer tokenizer)
{
//DATUM["OSGB 1936",SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6277"]]
Wgs84ConversionInfo wgsInfo = null;
string authority = String.Empty;
long authorityCode = -1;
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")
{
wgsInfo = ReadWGS84ConversionInfo(tokenizer);
tokenizer.NextToken();
}
else if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
// make an assumption about the datum type.
IHorizontalDatum horizontalDatum = new HorizontalDatum(ellipsoid, wgsInfo, DatumType.HD_Geocentric, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return horizontalDatum;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IPrimeMeridian ReadPrimeMeridian(WktStreamTokenizer tokenizer)
{
//PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]]
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double longitude = tokenizer.GetNumericValue();
tokenizer.NextToken();
string authority = String.Empty;
long authorityCode = -1;
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
// make an assumption about the Angular units - degrees.
IPrimeMeridian primeMeridian = new PrimeMeridian(longitude, AngularUnit.Degrees, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return primeMeridian;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjectedCoordinateSystem ReadProjectedCoordinateSystem(WktStreamTokenizer tokenizer)
{
/*PROJCS[
"OSGB 1936 / British National Grid",
GEOGCS[
"OSGB 1936",
DATUM[...]
PRIMEM[...]
AXIS["Geodetic latitude","NORTH"]
AXIS["Geodetic longitude","EAST"]
AUTHORITY["EPSG","4277"]
],
PROJECTION["Transverse Mercator"],
PARAMETER["latitude_of_natural_origin",49],
PARAMETER["longitude_of_natural_origin",-2],
PARAMETER["scale_factor_at_natural_origin",0.999601272],
PARAMETER["false_easting",400000],
PARAMETER["false_northing",-100000],
AXIS["Easting","EAST"],
AXIS["Northing","NORTH"],
AUTHORITY["EPSG","27700"]
]
*/
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.ReadToken("GEOGCS");
IGeographicCoordinateSystem geographicCS = ReadGeographicCoordinateSystem(tokenizer);
tokenizer.ReadToken(",");
IProjection projection = null;
IUnit unit = null;
List<AxisInfo> axes = new List<AxisInfo>(2);
string authority = String.Empty;
long authorityCode = -1;
TokenType ct = tokenizer.NextToken();
while (ct != TokenType.Eol && ct != TokenType.Eof)
{
switch (tokenizer.GetStringValue())
{
case ",":
case "]":
break;
case "PROJECTION":
projection = ReadProjection(tokenizer);
ct = tokenizer.GetTokenType();
continue;
//break;
case "UNIT":
unit = ReadLinearUnit(tokenizer);
break;
case "AXIS":
axes.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
break;
case "AUTHORITY":
tokenizer.ReadAuthority(ref authority, ref authorityCode);
//tokenizer.ReadToken("]");
break;
}
ct = tokenizer.NextToken();
}
//This is default axis values if not specified.
if (axes.Count == 0)
{
axes.Add(new AxisInfo("X", AxisOrientationEnum.East));
axes.Add(new AxisInfo("Y", AxisOrientationEnum.North));
}
IProjectedCoordinateSystem projectedCS = new ProjectedCoordinateSystem(geographicCS.HorizontalDatum, geographicCS, unit as LinearUnit, projection, axes, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return projectedCS;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IGeographicCoordinateSystem ReadGeographicCoordinateSystem(WktStreamTokenizer tokenizer)
{
/*
GEOGCS["OSGB 1936",
DATUM["OSGB 1936",SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6277"]]
PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]]
AXIS["Geodetic latitude","NORTH"]
AXIS["Geodetic longitude","EAST"]
AUTHORITY["EPSG","4277"]
]
*/
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 = -1;
tokenizer.NextToken();
List<AxisInfo> info = new List<AxisInfo>(2);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.NextToken();
while (tokenizer.GetStringValue() == "AXIS")
{
info.Add(ReadAxis(tokenizer));
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",") tokenizer.NextToken();
}
if (tokenizer.GetStringValue() == ",") tokenizer.NextToken();
if (tokenizer.GetStringValue() == "AUTHORITY")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
}
//This is default axis values if not specified.
if (info.Count == 0)
{
info.Add(new AxisInfo("Lon", AxisOrientationEnum.East));
info.Add(new AxisInfo("Lat", AxisOrientationEnum.North));
}
IGeographicCoordinateSystem geographicCS = new GeographicCoordinateSystem(angularUnit, horizontalDatum,
primeMeridian, info, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return geographicCS;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjection ReadProjection(WktStreamTokenizer tokenizer)
{
//tokenizer.NextToken();// PROJECTION
if (tokenizer.GetStringValue() != "PROJECTION")
tokenizer.ReadToken("PROJECTION");
tokenizer.ReadToken("[");//[
var projectionName = tokenizer.ReadDoubleQuotedWord();
var authority = string.Empty;
var authorityCode = -1L;
tokenizer.NextToken(true);
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
tokenizer.ReadToken(",");//,
tokenizer.ReadToken("PARAMETER");
var paramList = new List<ProjectionParameter>();
while (tokenizer.GetStringValue() == "PARAMETER")
{
tokenizer.ReadToken("[");
string paramName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double paramValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
paramList.Add(new ProjectionParameter(paramName, paramValue));
tokenizer.NextToken();
}
IProjection projection = new Projection(projectionName, paramList, projectionName, authority, authorityCode, String.Empty, String.Empty, string.Empty);
return projection;
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IProjection ReadProjection(WktStreamTokenizer tokenizer)
{
//tokenizer.NextToken();// PROJECTION
tokenizer.ReadToken("PROJECTION");
tokenizer.ReadToken("[");//[
string projectionName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken("]");//]
tokenizer.ReadToken(",");//,
tokenizer.ReadToken("PARAMETER");
List<ProjectionParameter> paramList = new List<ProjectionParameter>();
while (tokenizer.GetStringValue() == "PARAMETER")
{
tokenizer.ReadToken("[");
string paramName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double paramValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
paramList.Add(new ProjectionParameter(paramName, paramValue));
tokenizer.NextToken();
}
string authority = String.Empty;
long authorityCode = -1;
IProjection projection = new Projection(projectionName, paramList, projectionName, authority, authorityCode, String.Empty, String.Empty, string.Empty);
return projection;
}
/// <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)
{
//TOWGS84[0,0,0,0,0,0,0]
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;
}
private static IFittedCoordinateSystem ReadFittedCoordinateSystem (WktStreamTokenizer tokenizer)
{
/*
FITTED_CS[
"Local coordinate system MNAU (based on Gauss-Krueger)",
PARAM_MT[
"Affine",
PARAMETER["num_row",3],
PARAMETER["num_col",3],
PARAMETER["elt_0_0", 0.883485346527455],
PARAMETER["elt_0_1", -0.468458794848877],
PARAMETER["elt_0_2", 3455869.17937689],
PARAMETER["elt_1_0", 0.468458794848877],
PARAMETER["elt_1_1", 0.883485346527455],
PARAMETER["elt_1_2", 5478710.88035753],
PARAMETER["elt_2_2", 1],
],
PROJCS["DHDN / Gauss-Kruger zone 3", GEOGCS["DHDN", DATUM["Deutsches_Hauptdreiecksnetz", SPHEROID["Bessel 1841", 6377397.155, 299.1528128, AUTHORITY["EPSG", "7004"]], TOWGS84[612.4, 77, 440.2, -0.054, 0.057, -2.797, 0.525975255930096], AUTHORITY["EPSG", "6314"]], PRIMEM["Greenwich", 0, AUTHORITY["EPSG", "8901"]], UNIT["degree", 0.0174532925199433, AUTHORITY["EPSG", "9122"]], AUTHORITY["EPSG", "4314"]], UNIT["metre", 1, AUTHORITY["EPSG", "9001"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin", 0], PARAMETER["central_meridian", 9], PARAMETER["scale_factor", 1], PARAMETER["false_easting", 3500000], PARAMETER["false_northing", 0], AUTHORITY["EPSG", "31467"]]
AUTHORITY["CUSTOM","12345"]
]
*/
tokenizer.ReadToken ("[");
string name = tokenizer.ReadDoubleQuotedWord ();
tokenizer.ReadToken (",");
tokenizer.ReadToken ("PARAM_MT");
IMathTransform toBaseTransform = MathTransformWktReader.ReadMathTransform (tokenizer);
tokenizer.ReadToken (",");
tokenizer.NextToken ();
ICoordinateSystem baseCS = ReadCoordinateSystem (null, tokenizer);
string authority = String.Empty;
long authorityCode = -1;
TokenType ct = tokenizer.NextToken ();
while (ct != TokenType.Eol && ct != TokenType.Eof)
{
switch (tokenizer.GetStringValue ())
{
case ",":
case "]":
break;
case "AUTHORITY":
tokenizer.ReadAuthority (ref authority, ref authorityCode);
//tokenizer.ReadToken("]");
break;
}
ct = tokenizer.NextToken ();
}
IFittedCoordinateSystem fittedCS = new FittedCoordinateSystem (baseCS, toBaseTransform, name, authority, authorityCode, string.Empty, string.Empty, string.Empty);
return fittedCS;
}
private static IMathTransform ReadAffineTransform(WktStreamTokenizer tokenizer)
{
/*
* PARAM_MT[
* "Affine",
* PARAMETER["num_row",3],
* PARAMETER["num_col",3],
* PARAMETER["elt_0_0", 0.883485346527455],
* PARAMETER["elt_0_1", -0.468458794848877],
* PARAMETER["elt_0_2", 3455869.17937689],
* PARAMETER["elt_1_0", 0.468458794848877],
* PARAMETER["elt_1_1", 0.883485346527455],
* PARAMETER["elt_1_2", 5478710.88035753],
* PARAMETER["elt_2_2", 1]
* ]
*/
//tokenizer stands on the first PARAMETER
if (tokenizer.GetStringValue() != "PARAMETER")
{
tokenizer.ReadToken("PARAMETER");
}
IParameterInfo paramInfo = ReadParameters(tokenizer);
//manage required parameters - row, col
var rowParam = paramInfo.GetParameterByName("num_row");
var colParam = paramInfo.GetParameterByName("num_col");
if (rowParam == null)
{
throw new ArgumentNullException("Affine transform does not contain 'num_row' parameter");
}
if (colParam == null)
{
throw new ArgumentNullException("Affine transform does not contain 'num_col' parameter");
}
int rowVal = (int)rowParam.Value;
int colVal = (int)colParam.Value;
if (rowVal <= 0)
{
throw new ArgumentException("Affine transform contains invalid value of 'num_row' parameter");
}
if (colVal <= 0)
{
throw new ArgumentException("Affine transform contains invalid value of 'num_col' parameter");
}
//creates working matrix;
double[,] matrix = new double[rowVal, colVal];
//simply process matrix values - no elt_ROW_COL parsing
foreach (var param in paramInfo.Parameters)
{
if (param == null || param.Name == null)
{
continue;
}
switch (param.Name)
{
case "num_row":
case "num_col":
break;
case "elt_0_0":
matrix[0, 0] = param.Value;
break;
case "elt_0_1":
matrix[0, 1] = param.Value;
break;
case "elt_0_2":
matrix[0, 2] = param.Value;
break;
case "elt_0_3":
matrix[0, 3] = param.Value;
break;
case "elt_1_0":
matrix[1, 0] = param.Value;
break;
case "elt_1_1":
matrix[1, 1] = param.Value;
break;
case "elt_1_2":
matrix[1, 2] = param.Value;
break;
case "elt_1_3":
matrix[1, 3] = param.Value;
break;
case "elt_2_0":
matrix[2, 0] = param.Value;
break;
case "elt_2_1":
matrix[2, 1] = param.Value;
break;
case "elt_2_2":
matrix[2, 2] = param.Value;
break;
case "elt_2_3":
matrix[2, 3] = param.Value;
break;
case "elt_3_0":
matrix[3, 0] = param.Value;
break;
case "elt_3_1":
matrix[3, 1] = param.Value;
break;
case "elt_3_2":
matrix[3, 2] = param.Value;
break;
case "elt_3_3":
matrix[3, 3] = param.Value;
break;
default:
//unknown parameter
break;
}
}
//read rest of WKT
if (tokenizer.GetStringValue() != "]")
{
tokenizer.ReadToken("]");
}
//use "matrix" constructor to create transformation matrix
IMathTransform affineTransform = new AffineTransform(matrix);
return(affineTransform);
}
/*
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static ICompoundCoordinateSystem ReadCompoundCoordinateSystem(WktStreamTokenizer tokenizer)
{
//COMPD_CS[
//"OSGB36 / British National Grid + ODN",
//PROJCS[]
//VERT_CS[]
//AUTHORITY["EPSG","7405"]
//]
tokenizer.ReadToken("[");
string name=tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
string headCSCode = tokenizer.GetStringValue();
ICoordinateSystem headCS = ReadCoordinateSystem(headCSCode,tokenizer);
tokenizer.ReadToken(",");
tokenizer.NextToken();
string tailCSCode = tokenizer.GetStringValue();
ICoordinateSystem tailCS = ReadCoordinateSystem(tailCSCode,tokenizer);
tokenizer.ReadToken(",");
string authority=String.Empty;
string authorityCode=String.Empty;
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
ICompoundCoordinateSystem compoundCS = new CompoundCoordinateSystem(headCS,tailCS,String.Empty,authority,authorityCode,name,String.Empty,String.Empty);
return compoundCS;
}*/
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IEllipsoid ReadEllipsoid(WktStreamTokenizer tokenizer)
{
//SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]]
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double majorAxis = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double e = tokenizer.GetNumericValue();
//
//tokenizer.ReadToken(",");
tokenizer.NextToken();
string authority = String.Empty;
long authorityCode = -1;
if (tokenizer.GetStringValue() == ",") //Read authority
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
IEllipsoid ellipsoid = new Ellipsoid(majorAxis, 0.0, e, true, LinearUnit.Metre, name, authority, authorityCode, String.Empty, string.Empty, string.Empty);
return ellipsoid;
}
/// <summary>
/// Returns a <see cref="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 unitName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double unitsPerUnit = tokenizer.GetNumericValue();
string authority = String.Empty;
long authorityCode = -1;
tokenizer.NextToken();
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
return new AngularUnit(unitsPerUnit, unitName, authority, authorityCode, String.Empty, String.Empty, String.Empty);
}
