private Dictionary <string, string> _parameters; // any extra parameters.
#endregion
#region Constructors
/// <summary>
/// Creates a new instance of Parameters
/// </summary>
public ProjectionInfo()
{
_geographicInfo = new GeographicInfo();
_unit = new LinearUnit();
_parameters = new Dictionary <string, string>();
_scaleFactor = 1; // if not specified, default to 1
}
/// <summary>
/// Attempts to parse known parameters from the set of proj4 parameters
/// </summary>
/// <param name="proj4string"></param>
public void ReadProj4String(string proj4string)
{
string[] paramList = proj4string.Split('+');
foreach (string s in paramList)
{
if (s == "")
{
continue;
}
if (s == "no_defs")
{
continue;
}
string[] temp = s.Split('=');
string name = temp[0].Trim();
string value = "";
if (temp.Length > 1)
{
value = temp[1];
if (value != null)
{
value = value.Trim();
}
}
if (_parameters.ContainsKey(name))
{
// some "+to" parameters exist... but I'm not sure what to do with them
// asside from the fact that they seem to specify a second projection?
}
else
{
_parameters.Add(name, value);
}
}
GeographicInfo.ReadProj4Parameters(_parameters);
if (_parameters.ContainsKey("x_0"))
{
_falseEasting = double.Parse(_parameters["x_0"]);
}
if (_parameters.ContainsKey("y_0"))
{
_falseNorthing = double.Parse(_parameters["y_0"]);
}
if (_parameters.ContainsKey("k"))
{
_scaleFactor = double.Parse(_parameters["k"]);
}
if (_parameters.ContainsKey("k_0"))
{
_scaleFactor = double.Parse(_parameters["k_0"]);
}
if (_parameters.ContainsKey("lat_0"))
{
_latitudeOfOrigin = double.Parse(_parameters["lat_0"]);
}
if (_parameters.ContainsKey("lat_1"))
{
_standardParallel1 = double.Parse(_parameters["lat_1"]);
}
if (_parameters.ContainsKey("lat_ts"))
{
_standardParallel1 = double.Parse(_parameters["lat_ts"]);
}
if (_parameters.ContainsKey("lat_2"))
{
_standardParallel2 = double.Parse(_parameters["lat_2"]);
}
if (_parameters.ContainsKey("lon_0"))
{
_centralMeridian = double.Parse(_parameters["lon_0"]);
}
if (_parameters.ContainsKey("south"))
{
_south = true;
}
if (_parameters.ContainsKey("zone"))
{
_zone = int.Parse(_parameters["zone"]);
}
if (_parameters.ContainsKey("geoc"))
{
_geoc = bool.Parse(_parameters["geoc"]) && (GeographicInfo.Datum.Spheroid.EccentricitySquared() != 0);
}
if (_parameters.ContainsKey("over"))
{
_over = bool.Parse(_parameters["over"]);
}
if (_parameters.ContainsKey("proj"))
{
_transform = TransformManager.DefaultTransformManager.GetProj4(_parameters["proj"]);
_transform.Init(this);
//switch (_transform.ProjectionName)
//{
// case ProjectionNames.North_Polar_Stereographic:
// case ProjectionNames.South_Polar_Stereographic:
// if (_standardParallel1 != null)
// {
// _scaleFactor = Proj.CalScaleFactorFromStandardParallel((double)_standardParallel1);
// _standardParallel1 = null;
// }
// break;
//}
}
UpdateParam();
}
