private static bool ExtractHelmertParams(TransformationCompilationParams opData, out Vector3 translation, out Vector3 rotation, out double scale)
{
Contract.Requires(opData != null);
var xTransParam = new KeywordNamedParameterSelector("XAXIS", "TRANS");
var yTransParam = new KeywordNamedParameterSelector("YAXIS", "TRANS");
var zTransParam = new KeywordNamedParameterSelector("ZAXIS", "TRANS");
var xRotParam = new KeywordNamedParameterSelector("XAXIS", "ROT");
var yRotParam = new KeywordNamedParameterSelector("YAXIS", "ROT");
var zRotParam = new KeywordNamedParameterSelector("ZAXIS", "ROT");
var scaleParam = new KeywordNamedParameterSelector("SCALE");
translation = Vector3.Invalid;
rotation = Vector3.Invalid;
scale = Double.NaN;
if (!opData.ParameterLookup.Assign(xTransParam, yTransParam, zTransParam, xRotParam, yRotParam, zRotParam, scaleParam))
{
return(false);
}
if (!TryCreateVector3(xTransParam.Selection, yTransParam.Selection, zTransParam.Selection, out translation))
{
return(false);
}
if (!TryCreateVector3(xRotParam.Selection, yRotParam.Selection, zRotParam.Selection, OgcAngularUnit.DefaultArcSeconds, out rotation))
{
return(false);
}
if (!NamedParameter.TryGetDouble(scaleParam.Selection, out scale))
{
return(false);
}
ConvertIfVaild(scaleParam.Selection.Unit, ScaleUnitPartsPerMillion.Value, ref scale);
return(true);
}
private static bool TryGetDouble(INamedParameter parameter, IUnit unit, out double value)
{
if (!NamedParameter.TryGetDouble(parameter, out value))
{
return(false);
}
ConvertIfVaild(parameter.Unit, unit, ref value);
return(true);
}
private static bool TryGetCoefficientValue(INamedParameter parameter, out double value)
{
if (null != parameter && NamedParameter.TryGetDouble(parameter, out value))
{
ConvertIfVaild(parameter.Unit, ScaleUnitUnity.Value, ref value);
return(true);
}
value = default(double);
return(false);
}
private static bool TryCreatePoint2(INamedParameter xParam, INamedParameter yParam, IUnit linearUnit, out Point2 result)
{
double x, y;
if (NamedParameter.TryGetDouble(xParam, out x) && NamedParameter.TryGetDouble(yParam, out y))
{
if (null != linearUnit)
{
ConvertIfVaild(xParam.Unit, linearUnit, ref x);
ConvertIfVaild(yParam.Unit, linearUnit, ref y);
}
result = new Point2(x, y);
return(true);
}
result = Point2.Invalid;
return(false);
}
private static bool TryCreateVector3(INamedParameter xParam, INamedParameter yParam, INamedParameter zParam, IUnit linearUnit, out Vector3 result)
{
double x, y, z;
if (NamedParameter.TryGetDouble(xParam, out x) && NamedParameter.TryGetDouble(yParam, out y) && NamedParameter.TryGetDouble(zParam, out z))
{
if (null != linearUnit)
{
ConvertIfVaild(xParam.Unit, linearUnit, ref x);
ConvertIfVaild(yParam.Unit, linearUnit, ref y);
ConvertIfVaild(zParam.Unit, linearUnit, ref z);
}
result = new Vector3(x, y, z);
return(true);
}
result = Vector3.Invalid;
return(false);
}
private static StaticCoordinateOperationCompiler.StepCompilationResult CreateVerticalOffset(TransformationCompilationParams opData)
{
Contract.Requires(opData != null);
double offsetValue = 0;
var offsetParam = new KeywordNamedParameterSelector("OFFSET", "VERTICAL");
if (opData.ParameterLookup.Assign(offsetParam))
{
if (!NamedParameter.TryGetDouble(offsetParam.Selection, out offsetValue))
{
offsetValue = 0;
}
}
return(new StaticCoordinateOperationCompiler.StepCompilationResult(
opData.StepParams,
opData.StepParams.InputUnit,
new VerticalOffset(offsetValue)));
}
private static StaticCoordinateOperationCompiler.StepCompilationResult CreateGeographicOffset(TransformationCompilationParams opData)
{
Contract.Requires(opData != null);
var latParam = new KeywordNamedParameterSelector("LAT");
var lonParam = new KeywordNamedParameterSelector("LON");
var heightParam = new KeywordNamedParameterSelector("HEIGHT");
opData.ParameterLookup.Assign(latParam, lonParam);
var deltaLatitude = 0.0;
var deltaLongitude = 0.0;
var deltaHeight = 0.0;
if (!latParam.IsSelected && !lonParam.IsSelected && !heightParam.IsSelected)
{
return(null);
}
if (latParam.IsSelected)
{
TryGetDouble(latParam.Selection, opData.StepParams.InputUnit, out deltaLatitude);
}
if (lonParam.IsSelected)
{
TryGetDouble(lonParam.Selection, opData.StepParams.InputUnit, out deltaLongitude);
}
if (heightParam.IsSelected)
{
NamedParameter.TryGetDouble(heightParam.Selection, out deltaHeight);
}
var transformation = new GeographicOffset(deltaLatitude, deltaLongitude, deltaHeight);
return(new StaticCoordinateOperationCompiler.StepCompilationResult(
opData.StepParams,
opData.StepParams.InputUnit,
transformation));
}
private static StaticCoordinateOperationCompiler.StepCompilationResult CreateSimilarityTransformation(TransformationCompilationParams opData)
{
Contract.Requires(opData != null);
var xParam = new KeywordNamedParameterSelector("ORDINATE1");
var yParam = new KeywordNamedParameterSelector("ORDINATE2");
var mParam = new KeywordNamedParameterSelector("SCALE");
var rParam = new KeywordNamedParameterSelector("ROTATION");
if (!opData.ParameterLookup.Assign(xParam, yParam, mParam, rParam))
{
return(null);
}
Point2 origin;
if (!TryCreatePoint2(xParam.Selection, yParam.Selection, out origin))
{
return(null);
}
double scale, rotation;
if (!NamedParameter.TryGetDouble(mParam.Selection, out scale))
{
return(null);
}
if (!NamedParameter.TryGetDouble(rParam.Selection, out rotation))
{
return(null);
}
ConvertIfVaild(rParam.Selection.Unit, OgcAngularUnit.DefaultRadians, ref rotation);
return(new StaticCoordinateOperationCompiler.StepCompilationResult(
opData.StepParams,
opData.StepParams.RelatedOutputCrsUnit ?? opData.StepParams.RelatedInputCrsUnit ?? opData.StepParams.InputUnit,
new SimilarityTransformation(origin, scale, rotation)));
}
private static StaticCoordinateOperationCompiler.StepCompilationResult CreateMolodenskyBadekas(TransformationCompilationParams opData)
{
Contract.Requires(opData != null);
var xTransParam = new KeywordNamedParameterSelector("XAXIS", "TRANS");
var yTransParam = new KeywordNamedParameterSelector("YAXIS", "TRANS");
var zTransParam = new KeywordNamedParameterSelector("ZAXIS", "TRANS");
var xRotParam = new KeywordNamedParameterSelector("XAXIS", "ROT");
var yRotParam = new KeywordNamedParameterSelector("YAXIS", "ROT");
var zRotParam = new KeywordNamedParameterSelector("ZAXIS", "ROT");
var scaleParam = new KeywordNamedParameterSelector("SCALE");
var ord1Param = new KeywordNamedParameterSelector("ORDINATE1");
var ord2Param = new KeywordNamedParameterSelector("ORDINATE2");
var ord3Param = new KeywordNamedParameterSelector("ORDINATE3");
if (!opData.ParameterLookup.Assign(xTransParam, yTransParam, zTransParam, xRotParam, yRotParam, zRotParam, scaleParam, ord1Param, ord2Param, ord3Param))
{
return(null);
}
Vector3 translation, rotation;
Point3 ordinate;
double scale;
if (!TryCreateVector3(xTransParam.Selection, yTransParam.Selection, zTransParam.Selection, out translation))
{
return(null);
}
if (!TryCreateVector3(xRotParam.Selection, yRotParam.Selection, zRotParam.Selection, OgcAngularUnit.DefaultRadians, out rotation))
{
return(null);
}
if (!TryCreatePoint3(ord1Param.Selection, ord2Param.Selection, ord3Param.Selection, out ordinate))
{
return(null);
}
if (!NamedParameter.TryGetDouble(scaleParam.Selection, out scale))
{
return(null);
}
var molodensky = new MolodenskyBadekasTransformation(translation, rotation, ordinate, scale);
if (opData.StepParams.RelatedInputCrs is ICrsGeocentric && opData.StepParams.RelatedOutputCrs is ICrsGeocentric)
{
return(new StaticCoordinateOperationCompiler.StepCompilationResult(
opData.StepParams,
opData.StepParams.RelatedOutputCrsUnit ?? opData.StepParams.RelatedInputCrsUnit ?? opData.StepParams.InputUnit,
molodensky));
}
// TODO: need to handle units here
var spheroidFrom = opData.StepParams.RelatedInputSpheroid;
if (null == spheroidFrom)
{
return(null);
}
// TODO: need to handle units here
var spheroidTo = opData.StepParams.RelatedOutputSpheroid;
if (null == spheroidTo)
{
return(null);
}
ITransformation transformation = new GeocentricTransformationGeographicWrapper(spheroidFrom, spheroidTo, molodensky);
var conv = StaticCoordinateOperationCompiler.CreateCoordinateUnitConversion(opData.StepParams.InputUnit, OgcAngularUnit.DefaultRadians);
if (null != conv)
{
transformation = new ConcatenatedTransformation(new[] { conv, transformation });
}
return(new StaticCoordinateOperationCompiler.StepCompilationResult(
opData.StepParams,
OgcAngularUnit.DefaultRadians,
transformation));
}