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 WriteProjectedCoordinateSystem(ProjectedCoordinateSystem projCoordSystem)
{
string projP4 = ProjDB.ProjectionP4ByName(projCoordSystem.Projection.Name);
if (projP4 == String.Empty)
{
throw new NotImplementedException("Unknown projection " + projCoordSystem.Projection.Name);
}
_p4parameters.Add(new P4Parameter("+proj", projP4));
WriteGeographicCoordinateSystem(projCoordSystem.GeographicCoordinateSystem);
for (int i = 0; i < projCoordSystem.Projection.NumParameters; i++)
{
ProjectionParameter projParameter = projCoordSystem.Projection.GetParameter(i);
switch (projParameter.Name.ToLower())
{
case "latitude_of_origin":
case "latitude_of_center":
_p4parameters.Add(new P4Parameter("+lat_0", projParameter.Value.ToString(_nhi)));
break;
case "central_meridian":
case "longitude_of_origin":
case "longitude_of_center":
_p4parameters.Add(new P4Parameter("+lon_0", projParameter.Value.ToString(_nhi)));
break;
case "scale_factor":
_p4parameters.Add(new P4Parameter("+k", projParameter.Value.ToString(_nhi)));
break;
case "false_easting":
_p4parameters.Add(new P4Parameter("+x_0", projParameter.Value.ToString(_nhi)));
break;
case "false_northing":
_p4parameters.Add(new P4Parameter("+y_0", projParameter.Value.ToString(_nhi)));
break;
case "azimuth":
_p4parameters.Add(new P4Parameter("+alpha", projParameter.Value.ToString(_nhi)));
break;
case "standard_parallel_1":
_p4parameters.Add(new P4Parameter("+lat_1", projParameter.Value.ToString(_nhi)));
break;
case "standard_parallel_2":
_p4parameters.Add(new P4Parameter("+lat_2", projParameter.Value.ToString(_nhi)));
break;
}
}
}
private static void WriteProjectedCoordinateSystem(ProjectedCoordinateSystem projectedCoordinateSystem, bool esri, IndentedTextWriter writer)
{
writer.WriteLine("PROJCS[");
writer.Indent = writer.Indent + 1;
writer.WriteLine(String.Format("\"{0}\",", projectedCoordinateSystem.Name));
WriteGeographicCoordinateSystem(projectedCoordinateSystem.GeographicCoordinateSystem, esri, writer);
//writer.WriteLine(",");
WriteProjection(projectedCoordinateSystem.Projection, writer);
WriteLinearUnit(projectedCoordinateSystem.LinearUnit, esri, writer);
for (int dimension = 0; dimension < projectedCoordinateSystem.Dimension; dimension++)
{
WriteAxis(projectedCoordinateSystem.GetAxis(dimension), esri, writer);
}
//writer.WriteLine(String.Format("AUTHORITY[\"{0}\",\"{1}\"]", projectedCoordinateSystem.Authority, projectedCoordinateSystem.AuthorityCode));
WriteAuthority(projectedCoordinateSystem, esri, writer);
writer.Indent = writer.Indent - 1;
writer.WriteLine("]");
}
private static ProjectedCoordinateSystem ReadProjectedCoordinateSystem(string[] parameters)
{
// +proj=tmerc +lat_0=0 +lon_0=-62 +k=0.999500 +x_0=400000 +y_0=0 +ellps=clrk80 +towgs84=725,685,536,0,0,0,0 +units=m +no_defs
string projParam = ParameterValue(parameters, "+proj");
string projName = ProjDB.ProjectionNameByP4(projParam);
List <ProjectionParameter> projParameters = new List <ProjectionParameter>();
if (projParam.ToLower() == "utm" && projName.ToLower() == "transverse_mercator")
{
projParameters.Add(new ProjectionParameter("scale_factor", 0.9996));
projParameters.Add(new ProjectionParameter("false_easting", 500000.0));
}
foreach (string p4param in parameters)
{
string val;
string p4 = Parameter(p4param, out val);
double v;
if (!double.TryParse(val, NumberStyles.Number, _nhi, out v))
{
continue;
}
switch (p4)
{
case "+lat_0":
projParameters.Add(new ProjectionParameter("latitude_of_origin", v));
break;
case "+lon_0":
projParameters.Add(new ProjectionParameter("longitude_of_origin", v));
projParameters.Add(new ProjectionParameter("central_meridian", v));
break;
case "+k":
projParameters.Add(new ProjectionParameter("scale_factor", v));
break;
case "+x_0":
projParameters.Add(new ProjectionParameter("false_easting", v));
break;
case "+y_0":
projParameters.Add(new ProjectionParameter("false_northing", v));
break;
case "+alpha":
projParameters.Add(new ProjectionParameter("azimuth", v));
break;
case "+lat_1":
projParameters.Add(new ProjectionParameter("standard_parallel_1", v));
break;
case "+lat_2":
projParameters.Add(new ProjectionParameter("standard_parallel_2", v));
break;
case "+zone":
projParameters.Add(new ProjectionParameter("Central_Meridian", -177.0 + 6 * (v - 1)));
break;
}
}
Projection proj = new Projection(projName, projParameters.ToArray(), "", "", "", "");
GeographicCoordinateSystem geogrCoordSystem = ReadGeographicCoordinateSystem(parameters);
AxisInfo[] axis =
{
new AxisInfo("Easting", AxisOrientation.East),
new AxisInfo("Northing", AxisOrientation.North)
};
ProjectedCoordinateSystem projCoordSystem = new ProjectedCoordinateSystem(
geogrCoordSystem.HorizontalDatum,
axis,
geogrCoordSystem,
new LinearUnit(1.0, String.Empty, String.Empty, String.Empty, "metre", String.Empty, String.Empty),
proj);
projCoordSystem.Name = "Unknown";
return(projCoordSystem);
}
private static ProjectedCoordinateSystem ReadProjectedCoordinateSystem(WktStreamTokenizer tokenizer, bool includeAuthority)
{
//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");
GeographicCoordinateSystem geographicCS = ReadGeographicCoordinateSystem(tokenizer, includeAuthority);
tokenizer.ReadToken(",");
Projection projection = ReadProjection(tokenizer, includeAuthority);
tokenizer.ReadToken("UNIT");
Unit unit = ReadUnit(tokenizer, includeAuthority);
AxisInfo axisInfo1 = null, axisInfo2 = null;
if (tokenizer.TryReadToken(","))
{
if (tokenizer.TryReadToken("AXIS"))
{
axisInfo1 = ReadAxisInfo(tokenizer);
}
if (tokenizer.TryReadToken(","))
{
if (tokenizer.TryReadToken("AXIS"))
{
axisInfo2 = ReadAxisInfo(tokenizer);
}
}
}
string authority = String.Empty;
string authorityCode = String.Empty;
if (includeAuthority)
{
tokenizer.ReadToken(",");
tokenizer.ReadAuthority(ref authority, ref authorityCode);
}
tokenizer.ReadToken("]");
int axisInfoDim = 0;
if (axisInfo1 != null)
{
axisInfoDim = 1;
}
if (axisInfo2 != null)
{
axisInfoDim = 2;
}
AxisInfo[] axisArray = new AxisInfo[axisInfoDim];
if (axisInfo1 != null)
{
axisArray[0] = axisInfo1;
}
if (axisInfo2 != null)
{
axisArray[1] = axisInfo2;
}
ProjectedCoordinateSystem projectedCS = new ProjectedCoordinateSystem(geographicCS.HorizontalDatum, axisArray, geographicCS, unit as LinearUnit, projection, String.Empty, authority, authorityCode, name, String.Empty, String.Empty);
return(projectedCS);
}
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);
}