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(",");
string authority = "";
string authorityCode = "";
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
IEllipsoid ellipsoid = new Ellipsoid(majorAxis, 0.0, e, true, LinearUnit.Meters, "", authority, authorityCode, name, "", "");
return(ellipsoid);
}
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");
ParameterList paramList = new ParameterList();
while (tokenizer.GetStringValue() == "PARAMETER")
{
tokenizer.ReadToken("[");
string paramName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double paramValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
paramList.Add(paramName, paramValue);
tokenizer.NextToken();
}
ProjectionParameter[] paramArray = new ProjectionParameter[paramList.Count];
int i = 0;
foreach (string key in paramList.Keys)
{
ProjectionParameter param = new ProjectionParameter();
param.Name = key;
param.Value = (double)paramList[key];
paramArray[i] = param;
i++;
}
string authority = "";
string authorityCode = "";
IProjection projection = new Projection(projectionName, paramArray, "", "", authority, authorityCode);
return(projection);
}
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.ReadToken(",");
string authority = "";
string authorityCode = "";
tokenizer.ReadAuthority(ref authority, ref authorityCode);
// make an assumption about the Angular units - degrees.
IPrimeMeridian primeMeridian = new PrimeMeridian(name, new AngularUnit(180 / Math.PI), longitude, "", authority, authorityCode, "", "");
tokenizer.ReadToken("]");
return(primeMeridian);
}
/// <summary>
/// Returns a IUnit 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 IUnit ReadUnit(WktStreamTokenizer tokenizer)
{
//UNIT["degree",0.01745329251994433,AUTHORITY["EPSG","9102"]]
IUnit unit = null;
tokenizer.ReadToken("[");
string unitName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double unitsPerUnit = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
string authority = "";
string authorityCode = "";
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
switch (unitName)
{
// take into account the different spellings of the word meter/metre.
case "meter":
case "metre":
unit = new LinearUnit(unitsPerUnit, "", authority, authorityCode, unitName, "", "");
break;
case "degree":
case "radian":
unit = new AngularUnit(unitsPerUnit, "", authority, authorityCode, unitName, "", "");
break;
default:
throw new NotImplementedException(String.Format("{0} is not recognized a unit of measure.", unitName));
}
return(unit);
}
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.ReadToken(",");
tokenizer.NextToken();
info.Ex = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ey = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ez = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ppm = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
return(info);
}
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.ReadToken(",");
tokenizer.NextToken();
info.Ex=tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ey=tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ez=tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
tokenizer.NextToken();
info.Ppm=tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
return info;
}
private double GetNextNumber(WktStreamTokenizer tokenizer)
{
tokenizer.NextToken();
return(tokenizer.GetNumericValue());
}
/// <summary>
/// Returns a IUnit 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 IUnit ReadUnit(WktStreamTokenizer tokenizer)
{
//UNIT["degree",0.01745329251994433,AUTHORITY["EPSG","9102"]]
IUnit unit=null;
tokenizer.ReadToken("[");
string unitName=tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double unitsPerUnit = tokenizer.GetNumericValue();
tokenizer.ReadToken(",");
string authority="";
string authorityCode="";
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
switch (unitName)
{
// take into account the different spellings of the word meter/metre.
case "meter":
case "metre":
unit = new LinearUnit(unitsPerUnit,"",authority,authorityCode,unitName,"","");
break;
case "degree":
case "radian":
unit = new AngularUnit(unitsPerUnit,"",authority,authorityCode,unitName,"","");
break;
default:
throw new NotImplementedException(String.Format(System.Globalization.CultureInfo.InvariantCulture, "{0} is not recognized a unit of measure.",unitName));
}
return unit;
}
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");
ParameterList paramList = new ParameterList();
while (tokenizer.GetStringValue()=="PARAMETER")
{
tokenizer.ReadToken("[");
string paramName = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double paramValue = tokenizer.GetNumericValue();
tokenizer.ReadToken("]");
tokenizer.ReadToken(",");
paramList.Add(paramName,paramValue);
tokenizer.NextToken();
}
ProjectionParameter[] paramArray = new ProjectionParameter[paramList.Count];
int i=0;
foreach(string key in paramList.Keys)
{
ProjectionParameter param= new ProjectionParameter();
param.Name=key;
param.Value=(double)paramList[key];
paramArray[i]=param;
i++;
}
string authority="";
string authorityCode="";
IProjection projection = new Projection(projectionName, paramArray,"", "",authority, authorityCode);
return projection;
}
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.ReadToken(",");
string authority="";
string authorityCode="";
tokenizer.ReadAuthority(ref authority, ref authorityCode);
// make an assumption about the Angular units - degrees.
IPrimeMeridian primeMeridian = new PrimeMeridian(name,new AngularUnit(180/Math.PI),longitude,"",authority,authorityCode,"","");
tokenizer.ReadToken("]");
return primeMeridian;
}
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(",");
string authority="";
string authorityCode="";
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
IEllipsoid ellipsoid = new Ellipsoid(majorAxis,0.0,e,true,LinearUnit.Meters,"",authority,authorityCode,name,"","");
return ellipsoid;
}
private double GetNextNumber(WktStreamTokenizer tokenizer)
{
tokenizer.NextToken();
return tokenizer.GetNumericValue();
}
