public static IMathTransform CreateCoordinateOperation(IProjection projection, IEllipsoid ellipsoid)
{
ParameterList parameterList = new ParameterList();
for(int i=0; i< projection.NumParameters; i++)
{
ProjectionParameter param = projection.GetParameter(i);
parameterList.Add(param.Name,param.Value);
}
parameterList.Add("semi_major",ellipsoid.SemiMajorAxis);
parameterList.Add("semi_minor",ellipsoid.SemiMinorAxis);
IMathTransform transform = null;
switch(projection.Name.ToLower())
{
case "mercator":
//1SP
transform = new MercatorProjection(parameterList);
break;
case "transverse_mercator":
transform = new TransverseMercatorProjection(parameterList);
break;
case "albers":
transform = new AlbersProjection(parameterList);
break;
case "lambert":
transform = new LambertConformalConic2SPProjection(parameterList);
break;
default:
throw new NotSupportedException(String.Format(System.Globalization.CultureInfo.InvariantCulture, "Projection {0} is not supported.",projection.AuthorityCode));
}
return transform;
}
/// <summary>
/// Returns the inverse of this projection.
/// </summary>
/// <returns>IMathTransform that is the reverse of the current projection.</returns>
public override IMathTransform GetInverse()
{
if (_inverse == null)
{
_inverse = new TransverseMercatorProjection(this._parameters, !_isInverse);
}
return(_inverse);
}
/// <summary>
/// Given a IProjection and a IEllipsoid, createa a IMathTransform with the required parameters.
/// </summary>
/// <param name="projection">The projection information.</param>
/// <param name="ellipsoid">The ellipsoid to use.</param>
/// <returns>An object that implements the IMathTransform interface.</returns>
private IMathTransform CreateCoordinateOperation(IProjection projection, IEllipsoid ellipsoid)
{
ParameterList parameterList = new ParameterList();
for (int i = 0; i < projection.NumParameters; i++)
{
ProjectionParameter param = projection.GetParameter(i);
parameterList.Add(param.Name, param.Value);
}
parameterList.Add("semi_major", ellipsoid.SemiMajorAxis);
parameterList.Add("semi_minor", ellipsoid.SemiMinorAxis);
IMathTransform transform = null;
switch (projection.AuthorityCode)
{
case "9804":
//1SP
transform = new MercatorProjection(parameterList);
break;
case "9805":
//2SP
transform = new MercatorProjection(parameterList);
break;
case "9807":
transform = new TransverseMercatorProjection(parameterList);
break;
case "9633":
// we should get these parameters from the file - but since we know them....
ParameterList param = new ParameterList();
parameterList.Add("latitude_of_natural_origin", 49.0);
parameterList.Add("longitude_of_natural_origin", -2.0);
parameterList.Add("scale_factor_at_natural_origin", 0.999601272);
parameterList.Add("false_easting", 400000.0);
parameterList.Add("false_northing", -100000.0);
transform = new MercatorProjection(parameterList);
break;
default:
throw new NotSupportedException(String.Format("Projection {0} is not supported.", projection.AuthorityCode));
}
return(transform);
}
public static IMathTransform CreateCoordinateOperation(IProjection projection, IEllipsoid ellipsoid)
{
ParameterList parameterList = new ParameterList();
for (int i = 0; i < projection.NumParameters; i++)
{
ProjectionParameter param = projection.GetParameter(i);
parameterList.Add(param.Name, param.Value);
}
parameterList.Add("semi_major", ellipsoid.SemiMajorAxis);
parameterList.Add("semi_minor", ellipsoid.SemiMinorAxis);
IMathTransform transform = null;
switch (projection.Name.ToLower())
{
case "mercator":
//1SP
transform = new MercatorProjection(parameterList);
break;
case "transverse_mercator":
transform = new TransverseMercatorProjection(parameterList);
break;
case "albers":
transform = new AlbersProjection(parameterList);
break;
case "lambert":
transform = new LambertConformalConic2SPProjection(parameterList);
break;
default:
throw new NotSupportedException(String.Format("Projection {0} is not supported.", projection.AuthorityCode));
}
return(transform);
}
public void Test_Constructor()
{
ParameterList parameters = new ParameterList();
parameters.Add("latitude_of_natural_origin",49.0);
parameters.Add("longitude_of_natural_origin",-2.0);
parameters.Add("scale_factor_at_natural_origin",0.999601272);
parameters.Add("false_easting",400000.0);
parameters.Add("false_northing",-100000.0);
parameters.Add("semi_major",6377563.396);
parameters.Add("semi_minor",6377563.396);
TransverseMercatorProjection meractor = new TransverseMercatorProjection(parameters);
double long1 = -2.0;
double lat1 = 49.0;
CoordinatePoint pt = new CoordinatePoint();
pt.Ord = new Double[2];
pt.Ord.SetValue(long1,0);
pt.Ord.SetValue(lat1,1);
CoordinatePoint result1 = meractor.Transform(pt);
double metersX = (double)result1.Ord[0];
double metersY = (double)result1.Ord[1];
Assertion.AssertEquals("Transverse Mercator Transform X","400000",metersX.ToString());
Assertion.AssertEquals("Transverse Mercator Transform Y","-100000",metersY.ToString());
CoordinatePoint result2 = meractor.GetInverse().Transform(result1);
double long2= (double)result2.Ord[0];
double lat2= (double)result2.Ord[1];
Assertion.AssertEquals("Transverse Mercator InverseTransformPoint X","-2",long2.ToString());
Assertion.AssertEquals("TransverseMercator InverseTransformPoint Y","49",lat2.ToString());
}
/// <summary>
/// Given a IProjection and a IEllipsoid, createa a IMathTransform with the required parameters.
/// </summary>
/// <param name="projection">The projection information.</param>
/// <param name="ellipsoid">The ellipsoid to use.</param>
/// <returns>An object that implements the IMathTransform interface.</returns>
private IMathTransform CreateCoordinateOperation(IProjection projection, IEllipsoid ellipsoid)
{
ParameterList parameterList = new ParameterList();
for(int i=0; i< projection.NumParameters; i++)
{
ProjectionParameter param = projection.GetParameter(i);
parameterList.Add(param.Name,param.Value);
}
parameterList.Add("semi_major",ellipsoid.SemiMajorAxis);
parameterList.Add("semi_minor",ellipsoid.SemiMinorAxis);
IMathTransform transform = null;
switch(projection.AuthorityCode)
{
case "9804":
//1SP
transform = new MercatorProjection(parameterList);
break;
case "9805":
//2SP
transform = new MercatorProjection(parameterList);
break;
case "9807":
transform = new TransverseMercatorProjection(parameterList);
break;
case "9633":
// we should get these parameters from the file - but since we know them....
ParameterList param = new ParameterList();
parameterList.Add("latitude_of_natural_origin",49.0);
parameterList.Add("longitude_of_natural_origin",-2.0);
parameterList.Add("scale_factor_at_natural_origin",0.999601272);
parameterList.Add("false_easting",400000.0);
parameterList.Add("false_northing",-100000.0);
transform = new MercatorProjection(parameterList);
break;
default:
throw new NotSupportedException(String.Format(System.Globalization.CultureInfo.InvariantCulture, "Projection {0} is not supported.",projection.AuthorityCode));
}
return transform;
}
/// <summary>
///
/// </summary>
/// <param name="name">Name to give new object.</param>
/// <param name="wktProjectionClass">Classification string for projection (e.g. "Transverse_Mercator").</param>
/// <param name="parameters">Parameters to use for projection. A default set of parameters can
/// be constructed using classification and initialized
/// using a chain of SetParameter(...) calls.</param>
/// <returns>A projection.</returns>
public IProjection CreateProjection(string name, string wktProjectionClass, ProjectionParameter[] parameters)
{
if (name==null)
{
throw new ArgumentNullException("name");
}
ParameterList parameterList = new ParameterList();
for(int i=0; i< parameters.Length; i++)
{
ProjectionParameter param = parameters[i];
parameterList.Add(param.Name,param.Value);
}
IProjection projection= null;
switch (wktProjectionClass.ToLower())
{
case "transverse_mercator":
projection = new TransverseMercatorProjection(parameterList);
break;
case "mercator":
projection = new MercatorProjection(parameterList);
break;
case "lambert_conformal_conic_2sp":
projection = new LambertConformalConic2SPProjection(parameterList);
break;
case "albers":
projection = new AlbersProjection(parameterList);
break;
default:
throw new NotImplementedException(String.Format("The {0} projection is not supported",wktProjectionClass));
}
return projection;
}
/// <summary>
/// Returns the inverse of this projection.
/// </summary>
/// <returns>IMathTransform that is the reverse of the current projection.</returns>
public override IMathTransform GetInverse()
{
if (_inverse==null)
{
_inverse = new TransverseMercatorProjection(this._parameters, ! _isInverse);
}
return _inverse;
}