private static CoordinateSystem ReadCoordinateSystem(string coordinateSystem, WktStreamTokenizer tokenizer, bool includeAuthority)
{
CoordinateSystem returnCS = null;
switch (coordinateSystem)
{
case "VERT_CS":
VerticalCoordinateSystem verticalCS = ReadVerticalCoordinateSystem(tokenizer, includeAuthority);
returnCS = verticalCS;
break;
case "GEOGCS":
GeographicCoordinateSystem geographicCS = ReadGeographicCoordinateSystem(tokenizer, includeAuthority);
returnCS = geographicCS;
break;
case "PROJCS":
ProjectedCoordinateSystem projectedCS = ReadProjectedCoordinateSystem(tokenizer, includeAuthority);
returnCS = projectedCS;
break;
case "COMPD_CS":
CompoundCoordinateSystem compoundCS = ReadCompoundCoordinateSystem(tokenizer, includeAuthority);
returnCS = compoundCS;
break;
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
throw new InvalidOperationException(String.Format("{0} coordinate system is not recongized.", coordinateSystem));
}
return(returnCS);
}
private static void WriteCompoundCoordinateSystem(CompoundCoordinateSystem compoundCoordinateSystem, bool esri, IndentedTextWriter writer)
{
writer.WriteLine("COMPD_CS[");
writer.Indent = writer.Indent + 1;
writer.WriteLine(String.Format("\"{0}\",", compoundCoordinateSystem.Name));
WriteCoordinateSystem(compoundCoordinateSystem.HeadCS, esri, writer);
writer.WriteLine(",");
WriteCoordinateSystem(compoundCoordinateSystem.TailCS, esri, writer);
writer.WriteLine(",");
//writer.WriteLine(String.Format("AUTHORITY[\"{0}\",\"{1}\"]", compoundCoordinateSystem.Authority, compoundCoordinateSystem.AuthorityCode));
WriteAuthority(compoundCoordinateSystem, esri, writer);
writer.Indent = writer.Indent - 1;
writer.WriteLine("]");
}
private static CompoundCoordinateSystem ReadCompoundCoordinateSystem(WktStreamTokenizer tokenizer, bool includeAuthority)
{
//COMPD_CS[
//"OSGB36 / British National Grid + ODN",
//PROJCS[]
//VERT_CS[]
//AUTHORITY["EPSG","7405"]
//]
//TODO add a ReadCoordinateSystem - that determines the correct coordinate system to
//read. Right now this hard coded for a projected and a vertical coord sys - so the UK
//national grid works.
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
string headCSCode = tokenizer.GetStringValue();
CoordinateSystem headCS = ReadCoordinateSystem(headCSCode, tokenizer, includeAuthority);
tokenizer.ReadToken(",");
tokenizer.NextToken();
string tailCSCode = tokenizer.GetStringValue();
CoordinateSystem tailCS = ReadCoordinateSystem(tailCSCode, tokenizer, includeAuthority);
string authority = String.Empty;
string authorityCode = String.Empty;
if (includeAuthority)
{
tokenizer.ReadToken(",");
tokenizer.ReadAuthority(ref authority, ref authorityCode);
}
tokenizer.ReadToken("]");
CompoundCoordinateSystem compoundCS = new CompoundCoordinateSystem(headCS, tailCS, String.Empty, authority, authorityCode, name, String.Empty, String.Empty);
return(compoundCS);
}
public static object Create(string wkt)
{
object returnObject = null;
bool includeAuthority = (wkt.ToLower().IndexOf("authority") != -1);
StringReader reader = new StringReader(wkt);
WktStreamTokenizer tokenizer = new WktStreamTokenizer(reader);
tokenizer.NextToken();
string objectName = tokenizer.GetStringValue();
switch (objectName)
{
case "UNIT":
Unit unit = ReadUnit(tokenizer, includeAuthority);
returnObject = unit;
break;
case "VERT_DATUM":
VerticalDatum verticalDatum = ReadVerticalDatum(tokenizer, includeAuthority);
returnObject = verticalDatum;
break;
case "SPHEROID":
Ellipsoid ellipsoid = ReadEllipsoid(tokenizer, includeAuthority);
returnObject = ellipsoid;
break;
case "TOWGS84":
WGS84ConversionInfo wgsInfo = ReadWGS84ConversionInfo(tokenizer, includeAuthority);
returnObject = wgsInfo;
break;
case "DATUM":
HorizontalDatum horizontalDatum = ReadHorizontalDatum(tokenizer, includeAuthority);
returnObject = horizontalDatum;
break;
case "PRIMEM":
PrimeMeridian primeMeridian = ReadPrimeMeridian(tokenizer, includeAuthority);
returnObject = primeMeridian;
break;
case "VERT_CS":
VerticalCoordinateSystem verticalCS = ReadVerticalCoordinateSystem(tokenizer, includeAuthority);
returnObject = verticalCS;
break;
case "GEOGCS":
GeographicCoordinateSystem geographicCS = ReadGeographicCoordinateSystem(tokenizer, includeAuthority);
returnObject = geographicCS;
break;
case "PROJCS":
ProjectedCoordinateSystem projectedCS = ReadProjectedCoordinateSystem(tokenizer, includeAuthority);
returnObject = projectedCS;
break;
case "COMPD_CS":
CompoundCoordinateSystem compoundCS = ReadCompoundCoordinateSystem(tokenizer, includeAuthority);
returnObject = compoundCS;
break;
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
throw new NotSupportedException(String.Format("{0} is not implemented.", objectName));
default:
throw new ParseException(String.Format("'{0'} is not recongnized.", objectName));
}
reader.Close();
return(returnObject);
}
