/// <summary> /// /// </summary> /// <param name="tokenizer"></param> /// <returns></returns> private static Ellipsoid 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("]"); } Ellipsoid ellipsoid = new Ellipsoid(majorAxis, e, LinearUnit.Metre) { Name = name, Id = authorityCode + "" }; return(ellipsoid); }
/// <summary> /// /// </summary> /// <param name="tokenizer"></param> /// <returns></returns> private static Projection 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; Projection projection = new Projection( projectionName, paramList, authorityCode + "", projectionName); return(projection); }
/// <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 AngularUnit 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() { Id = authorityCode + "", Name = unitName, Abbreviation = unitName, RadiansPerUnit = unitsPerUnit }); }
/// <summary> /// Reads either 3, 6 or 7 parameter Bursa-Wolf values from TOWGS84 token /// </summary> /// <param name="tokenizer"></param> /// <returns></returns> private static BursaTransParams ReadWGS84ConversionInfo(WktStreamTokenizer tokenizer) { //TOWGS84[0,0,0,0,0,0,0] tokenizer.ReadToken("["); BursaTransParams info = new BursaTransParams(); 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.Scale_ppm = tokenizer.GetNumericValue(); } } if (tokenizer.GetStringValue() != "]") { tokenizer.ReadToken("]"); } return(info); }
/// <summary> /// /// </summary> /// <param name="tokenizer"></param> /// <returns></returns> private static PrimeMeridian 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. PrimeMeridian primeMeridian = new PrimeMeridian(longitude, AngularUnit.Degree, name, authorityCode + ""); return(primeMeridian); }