private static void ApplyParametersStere(ProjectionInfo result, IEnumerable <INamedParameter> parameters)
{
Contract.Requires(result != null);
Contract.Requires(parameters != null);
var lon0Param = new MultiParameterSelector(
new CentralMeridianParameterSelector(),
new LongitudeOfNaturalOriginParameterSelector(),
new LongitudeOfCenterParameterSelector());
var spParam = new MultiParameterSelector(
new LatitudeOfTrueScaleParameterSelector(),
new StandardParallelParameterSelector(),
new LatitudeOfNaturalOriginParameterSelector(),
new LatitudeOfCenterParameterSelector());
var k0Param = new ScaleFactorParameterSelector();
var x0Param = new FalseEastingParameterSelector();
var y0Param = new FalseNorthingParameterSelector();
var paramLookup = new NamedParameterLookup(parameters);
paramLookup.Assign(lon0Param, spParam, k0Param, x0Param, y0Param);
if (lon0Param.IsSelected)
{
result.CentralMeridian = lon0Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (spParam.IsSelected)
{
result.StandardParallel1 = spParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (k0Param.IsSelected)
{
result.ScaleFactor = k0Param.GetValueAsDouble(ScaleUnitUnity.Value) ?? 1.0;
}
if (x0Param.IsSelected)
{
result.FalseEasting = x0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
}
if (y0Param.IsSelected)
{
result.FalseNorthing = y0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
}
if (!result.LatitudeOfOrigin.HasValue && result.StandardParallel1.HasValue)
{
result.LatitudeOfOrigin = result.StandardParallel1.GetValueOrDefault() >= 0 ? 90.0 : -90.0;
}
}
private static void ApplyParametersStere(ProjectionInfo result, IEnumerable<INamedParameter> parameters)
{
Contract.Requires(result != null);
Contract.Requires(parameters != null);
var lon0Param = new MultiParameterSelector(
new CentralMeridianParameterSelector(),
new LongitudeOfNaturalOriginParameterSelector(),
new LongitudeOfCenterParameterSelector());
var spParam = new MultiParameterSelector(
new LatitudeOfTrueScaleParameterSelector(),
new StandardParallelParameterSelector(),
new LatitudeOfNaturalOriginParameterSelector(),
new LatitudeOfCenterParameterSelector());
var k0Param = new ScaleFactorParameterSelector();
var x0Param = new FalseEastingParameterSelector();
var y0Param = new FalseNorthingParameterSelector();
var paramLookup = new NamedParameterLookup(parameters);
paramLookup.Assign(lon0Param, spParam, k0Param, x0Param, y0Param);
if (lon0Param.IsSelected)
result.CentralMeridian = lon0Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (spParam.IsSelected)
result.StandardParallel1 = spParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (k0Param.IsSelected)
result.ScaleFactor = k0Param.GetValueAsDouble(ScaleUnitUnity.Value) ?? 1.0;
if (x0Param.IsSelected)
result.FalseEasting = x0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
if (y0Param.IsSelected)
result.FalseNorthing = y0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
if (!result.LatitudeOfOrigin.HasValue && result.StandardParallel1.HasValue)
result.LatitudeOfOrigin = result.StandardParallel1.GetValueOrDefault() >= 0 ? 90.0 : -90.0;
}
private static void ApplyParametersDefault(ProjectionInfo result, IEnumerable <INamedParameter> parameters)
{
Contract.Requires(result != null);
Contract.Requires(parameters != null);
var lon0Param = new MultiParameterSelector(
new CentralMeridianParameterSelector(),
new LongitudeOfNaturalOriginParameterSelector()
);
var loncParam = new LongitudeOfCenterParameterSelector();
var lat0Param = new MultiParameterSelector(
new LatitudeOfCenterParameterSelector(),
new LatitudeOfNaturalOriginParameterSelector());
var lat1Param = new StandardParallelParameterSelector(1);
var lat2Param = new StandardParallelParameterSelector(2);
var x0Param = new FalseEastingParameterSelector();
var y0Param = new FalseNorthingParameterSelector();
var k0Param = new ScaleFactorParameterSelector();
var alphaParam = new KeywordNamedParameterSelector("ALPHA", "AZIMUTH");
var angleSkewParam = new KeywordNamedParameterSelector("SKEW", "GAMMA");
var zoneParam = new FullMatchParameterSelector("ZONE");
var southParam = new FullMatchParameterSelector("SOUTH");
var standardParallel1Param = new MultiParameterSelector(
new StandardParallelParameterSelector(),
new StandardParallelParameterSelector(1));
var standardParallel2Param = new StandardParallelParameterSelector(2);
var paramLookup = new NamedParameterLookup(parameters);
paramLookup.Assign(lon0Param, loncParam, lat0Param, lat1Param, lat2Param, x0Param, y0Param, k0Param, alphaParam, angleSkewParam, zoneParam, southParam, standardParallel1Param, standardParallel2Param);
if (lon0Param.IsSelected)
{
result.CentralMeridian = lon0Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (loncParam.IsSelected)
{
result.LongitudeOfCenter = loncParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (lat0Param.IsSelected)
{
result.LatitudeOfOrigin = lat0Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (lat1Param.IsSelected)
{
result.StandardParallel1 = lat1Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (lat2Param.IsSelected)
{
result.StandardParallel2 = lat2Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (x0Param.IsSelected)
{
result.FalseEasting = x0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
}
if (y0Param.IsSelected)
{
result.FalseNorthing = y0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
}
if (k0Param.IsSelected)
{
result.ScaleFactor = k0Param.GetValueAsDouble(ScaleUnitUnity.Value) ?? 1.0;
}
if (alphaParam.IsSelected)
{
result.alpha = alphaParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
/*if (angleSkewParam.IsSelected)
* result.gamma = angleSkewParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);*/
if (southParam.IsSelected)
{
result.IsSouth = southParam.GetValueAsBoolean().GetValueOrDefault();
}
if (standardParallel1Param.IsSelected)
{
result.StandardParallel1 = standardParallel1Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (standardParallel2Param.IsSelected)
{
result.StandardParallel2 = standardParallel2Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
}
if (zoneParam.IsSelected)
{
result.Zone = zoneParam.GetValueAsInt32();
}
}
private SpheroidProjectionBase CreatePolarStereographic(ProjectionCompilationParams opData)
{
Contract.Requires(opData != null);
var latParam = new MultiParameterSelector(
new LatitudeOfNaturalOriginParameterSelector(),
new LatitudeOfTrueScaleParameterSelector());
var originLonParam = new MultiParameterSelector(
new LongitudeOfNaturalOriginParameterSelector(),
new FullMatchParameterSelector("LONDOWNFROMPOLE"));// new KeywordNamedParameterSelector("LON", "ORIGIN");
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var standardParallelParam = new StandardParallelParameterSelector();
var scaleFactorParam = new ScaleFactorParameterSelector();
opData.ParameterLookup.Assign(latParam, originLonParam, offsetXParam, offsetYParam, standardParallelParam, scaleFactorParam);
var linearUnit = opData.StepParams.RelatedOutputCrsUnit;
var fromSpheroid = opData.StepParams.ConvertRelatedOutputSpheroidUnit(linearUnit);
if (null == fromSpheroid)
return null;
double latitude, longitude;
if (!latParam.TryGetValueAsDouble(OgcAngularUnit.DefaultRadians, out latitude))
latitude = 0;
if (!originLonParam.TryGetValueAsDouble(OgcAngularUnit.DefaultRadians, out longitude))
longitude = 0;
double xOffset, yOffset;
var offset = (offsetXParam.TryGetValueAsDouble(linearUnit, out xOffset) && offsetYParam.TryGetValueAsDouble(linearUnit, out yOffset))
? new Vector2(xOffset, yOffset)
: Vector2.Zero;
double scaleFactor;
if (scaleFactorParam.TryGetValueAsDouble(ScaleUnitUnity.Value, out scaleFactor))
return new PolarStereographic(new GeographicCoordinate(latitude,longitude), scaleFactor, offset, fromSpheroid);
double standardParallel;
if (standardParallelParam.TryGetValueAsDouble(OgcAngularUnit.DefaultRadians, out standardParallel)) {
if (
(offsetXParam.IsSelected && opData.ParameterLookup.ParameterNameNormalizedComparer.Normalize(offsetXParam.Selection.Name).Contains("ORIGIN"))
|| (offsetYParam.IsSelected && opData.ParameterLookup.ParameterNameNormalizedComparer.Normalize(offsetYParam.Selection.Name).Contains("ORIGIN"))
) {
return PolarStereographic.CreateFromStandardParallelAndFalseOffsetAtOrigin(longitude, standardParallel, offset, fromSpheroid);
}
return PolarStereographic.CreateFromStandardParallel(longitude, standardParallel, offset, fromSpheroid);
}
throw new InvalidOperationException();
}
private static void ApplyParametersDefault(ProjectionInfo result, IEnumerable<INamedParameter> parameters)
{
Contract.Requires(result != null);
Contract.Requires(parameters != null);
var lon0Param = new MultiParameterSelector(
new CentralMeridianParameterSelector(),
new LongitudeOfNaturalOriginParameterSelector()
);
var loncParam = new LongitudeOfCenterParameterSelector();
var lat0Param = new MultiParameterSelector(
new LatitudeOfCenterParameterSelector(),
new LatitudeOfNaturalOriginParameterSelector());
var lat1Param = new StandardParallelParameterSelector(1);
var lat2Param = new StandardParallelParameterSelector(2);
var x0Param = new FalseEastingParameterSelector();
var y0Param = new FalseNorthingParameterSelector();
var k0Param = new ScaleFactorParameterSelector();
var alphaParam = new KeywordNamedParameterSelector("ALPHA", "AZIMUTH");
var angleSkewParam = new KeywordNamedParameterSelector("SKEW", "GAMMA");
var zoneParam = new FullMatchParameterSelector("ZONE");
var southParam = new FullMatchParameterSelector("SOUTH");
var standardParallel1Param = new MultiParameterSelector(
new StandardParallelParameterSelector(),
new StandardParallelParameterSelector(1));
var standardParallel2Param = new StandardParallelParameterSelector(2);
var paramLookup = new NamedParameterLookup(parameters);
paramLookup.Assign(lon0Param, loncParam, lat0Param, lat1Param, lat2Param, x0Param, y0Param, k0Param, alphaParam, angleSkewParam, zoneParam, southParam, standardParallel1Param, standardParallel2Param);
if (lon0Param.IsSelected)
result.CentralMeridian = lon0Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (loncParam.IsSelected)
result.LongitudeOfCenter = loncParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (lat0Param.IsSelected)
result.LatitudeOfOrigin = lat0Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (lat1Param.IsSelected)
result.StandardParallel1 = lat1Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (lat2Param.IsSelected)
result.StandardParallel2 = lat2Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (x0Param.IsSelected)
result.FalseEasting = x0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
if (y0Param.IsSelected)
result.FalseNorthing = y0Param.GetValueAsDouble(OgcLinearUnit.DefaultMeter);
if (k0Param.IsSelected)
result.ScaleFactor = k0Param.GetValueAsDouble(ScaleUnitUnity.Value) ?? 1.0;
if (alphaParam.IsSelected)
result.alpha = alphaParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
/*if (angleSkewParam.IsSelected)
result.gamma = angleSkewParam.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);*/
if (southParam.IsSelected)
result.IsSouth = southParam.GetValueAsBoolean().GetValueOrDefault();
if (standardParallel1Param.IsSelected)
result.StandardParallel1 = standardParallel1Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (standardParallel2Param.IsSelected)
result.StandardParallel2 = standardParallel2Param.GetValueAsDouble(OgcAngularUnit.DefaultDegrees);
if (zoneParam.IsSelected)
result.Zone = zoneParam.GetValueAsInt32();
}
private SpheroidProjectionBase CreateObliqueStereographic(ProjectionCompilationParams opData)
{
Contract.Requires(opData != null);
var originLatParam = new LatitudeOfNaturalOriginParameterSelector();
var originLonParam = new LongitudeOfNaturalOriginParameterSelector();
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var scaleFactorParam = new ScaleFactorParameterSelector();
opData.ParameterLookup.Assign(originLatParam, originLonParam, offsetXParam, offsetYParam, scaleFactorParam);
var spheroid = opData.StepParams.ConvertRelatedOutputSpheroidUnit(opData.StepParams.RelatedOutputCrsUnit);
if (null == spheroid)
return null;
GeographicCoordinate origin;
if (!(originLatParam.IsSelected || originLonParam.IsSelected) || !TryCreateGeographicCoordinate(originLatParam.Selection, originLonParam.Selection, out origin))
origin = GeographicCoordinate.Zero;
Vector2 offset;
if (!(offsetXParam.IsSelected || offsetYParam.IsSelected) || !TryCreateVector2(offsetXParam.Selection, offsetYParam.Selection, opData.StepParams.RelatedOutputCrsUnit, out offset))
offset = Vector2.Zero;
double scaleFactor;
if (scaleFactorParam.IsSelected && TryGetDouble(scaleFactorParam.Selection, ScaleUnitUnity.Value, out scaleFactor))
return new ObliqueStereographic(origin, scaleFactor, offset, spheroid);
return null;
}
private ITransformation<GeographicCoordinate, Point2> CreateMercator(ProjectionCompilationParams opData)
{
Contract.Requires(opData != null);
var originLatParam = new MultiParameterSelector(
new LatitudeOfNaturalOriginParameterSelector(),
new LatitudeOfTrueScaleParameterSelector(),
new StandardParallelParameterSelector());
var originLonParam = new MultiParameterSelector(
new CentralMeridianParameterSelector(),
new LongitudeOfNaturalOriginParameterSelector());
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var scaleFactorParam = new ScaleFactorParameterSelector();
opData.ParameterLookup.Assign(originLatParam, originLonParam, offsetXParam, offsetYParam, scaleFactorParam);
var spheroid = opData.StepParams.ConvertRelatedOutputSpheroidUnit(opData.StepParams.RelatedOutputCrsUnit);
if (null == spheroid)
return null;
GeographicCoordinate origin;
if (!(originLatParam.IsSelected || originLonParam.IsSelected) || !TryCreateGeographicCoordinate(originLatParam.Selection, originLonParam.Selection, out origin))
origin = GeographicCoordinate.Zero;
Vector2 offset;
if (!(offsetXParam.IsSelected || offsetYParam.IsSelected) || !TryCreateVector2(offsetXParam.Selection, offsetYParam.Selection, opData.StepParams.RelatedOutputCrsUnit, out offset))
offset = Vector2.Zero;
// ReSharper disable CompareOfFloatsByEqualityOperator
double scaleFactor;
if (scaleFactorParam.IsSelected && TryGetDouble(scaleFactorParam.Selection, ScaleUnitUnity.Value, out scaleFactor)) {
if (1 == scaleFactor && 0 == spheroid.E)
return new MercatorSpherical(offset, origin.Longitude, spheroid.A);
return new Mercator(origin.Longitude, scaleFactor, offset, spheroid);
}
if (0 == spheroid.E)
return new MercatorSpherical(offset, origin.Longitude, spheroid.A);
return new Mercator(origin, offset, spheroid);
// ReSharper restore CompareOfFloatsByEqualityOperator
}
private ITransformation<GeographicCoordinate, Point2> CreateLambertConicConformal(ProjectionCompilationParams opData)
{
Contract.Requires(opData != null);
var originLatParam = new KeywordNamedParameterSelector("LAT", "ORIGIN");
var originLonParam = new KeywordNamedParameterSelector("LON", "ORIGIN", "CENTRAL", "MERIDIAN");
var parallel1Param = new KeywordNamedParameterSelector("LAT", "1", "PARALLEL");
var parallel2Param = new KeywordNamedParameterSelector("LAT", "2", "PARALLEL");
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var scaleFactorParam = new ScaleFactorParameterSelector();
opData.ParameterLookup.Assign(originLatParam, originLonParam, offsetXParam, offsetYParam, scaleFactorParam, parallel1Param, parallel2Param);
var spheroid = opData.StepParams.ConvertRelatedOutputSpheroidUnit(opData.StepParams.RelatedOutputCrsUnit);
if (null == spheroid)
return null;
GeographicCoordinate origin;
if (!(originLatParam.IsSelected || originLonParam.IsSelected) || !TryCreateGeographicCoordinate(originLatParam.Selection, originLonParam.Selection, out origin))
origin = GeographicCoordinate.Zero;
Vector2 offset;
if (!(offsetXParam.IsSelected || offsetYParam.IsSelected) || !TryCreateVector2(offsetXParam.Selection, offsetYParam.Selection, opData.StepParams.RelatedOutputCrsUnit, out offset))
offset = Vector2.Zero;
double parallel1, parallel2;
if (parallel1Param.IsSelected && parallel2Param.IsSelected && TryGetDouble(parallel1Param.Selection, OgcAngularUnit.DefaultRadians, out parallel1) && TryGetDouble(parallel2Param.Selection, OgcAngularUnit.DefaultRadians, out parallel2)) {
if (_coordinateOperationNameComparer.Normalize(opData.OperationName).EndsWith("BELGIUM"))
return new LambertConicConformalBelgium(origin, parallel1, parallel2, offset, spheroid);
return new LambertConicConformal2Sp(origin, parallel1, parallel2, offset, spheroid);
}
if (scaleFactorParam.IsSelected){
double scaleFactor;
if(TryGetDouble(scaleFactorParam.Selection, ScaleUnitUnity.Value, out scaleFactor))
return new LambertConicConformal1Sp(origin, scaleFactor, offset, spheroid);
}
return null;
}
private SpheroidProjectionBase CreateLabordeObliqueMercator(ProjectionCompilationParams opData)
{
Contract.Requires(opData != null);
var originLatParam = new KeywordNamedParameterSelector("LAT", "CENTER");
var originLonParam = new KeywordNamedParameterSelector("LON", "CENTER");
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var scaleFactorParam = new ScaleFactorParameterSelector();
var azimuthParam = new KeywordNamedParameterSelector("AZIMUTH");
opData.ParameterLookup.Assign(originLatParam, originLonParam, offsetXParam, offsetYParam, scaleFactorParam, azimuthParam);
var spheroid = opData.StepParams.ConvertRelatedOutputSpheroidUnit(opData.StepParams.RelatedOutputCrsUnit);
if (null == spheroid)
return null;
GeographicCoordinate origin;
if (!(originLatParam.IsSelected || originLonParam.IsSelected) || !TryCreateGeographicCoordinate(originLatParam.Selection, originLonParam.Selection, out origin))
origin = GeographicCoordinate.Zero;
Vector2 offset;
if (!(offsetXParam.IsSelected || offsetYParam.IsSelected) || !TryCreateVector2(offsetXParam.Selection, offsetYParam.Selection, opData.StepParams.RelatedOutputCrsUnit, out offset))
offset = Vector2.Zero;
double scaleFactor;
if (!scaleFactorParam.IsSelected || !TryGetDouble(scaleFactorParam.Selection, ScaleUnitUnity.Value, out scaleFactor))
scaleFactor = 1.0;
double azimuth;
if (!azimuthParam.IsSelected || !TryGetDouble(azimuthParam.Selection, OgcAngularUnit.DefaultRadians, out azimuth))
azimuth = 0;
return new LabordeObliqueMercator(origin, azimuth, scaleFactor, spheroid, offset);
}
private SpheroidProjectionBase CreateHotineObliqueMercator(ProjectionCompilationParams opData)
{
Contract.Requires(opData != null);
var latParam = new MultiParameterSelector(
new LatitudeOfCenterParameterSelector(),
new LatitudeOfNaturalOriginParameterSelector());
var lonParam = new MultiParameterSelector(
new LongitudeOfCenterParameterSelector(),
new LongitudeOfNaturalOriginParameterSelector());
var scaleFactorParam = new ScaleFactorParameterSelector();
var azimuthParam = new KeywordNamedParameterSelector("AZIMUTH");
var angleSkewParam = new KeywordNamedParameterSelector("ANGLE", "SKEW");
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var xAtOriginParam = new EastingAtCenterParameterSelector();
var yAtOriginParam = new NorthingAtCenterParameterSelector();
opData.ParameterLookup.Assign(latParam, lonParam, offsetXParam, offsetYParam, xAtOriginParam, yAtOriginParam, scaleFactorParam, azimuthParam, angleSkewParam);
var spheroid = opData.StepParams.ConvertRelatedOutputSpheroidUnit(opData.StepParams.RelatedOutputCrsUnit);
if (null == spheroid)
return null;
double lat, lon;
if(!latParam.IsSelected || !latParam.TryGetValueAsDouble(OgcAngularUnit.DefaultRadians, out lat))
lat = 0;
if(!lonParam.IsSelected || !lonParam.TryGetValueAsDouble(OgcAngularUnit.DefaultRadians, out lon))
lon = 0;
var origin = new GeographicCoordinate(lat, lon);
double scaleFactor;
if (!scaleFactorParam.IsSelected || !TryGetDouble(scaleFactorParam.Selection, ScaleUnitUnity.Value, out scaleFactor))
scaleFactor = 1.0;
double azimuth;
if (!azimuthParam.IsSelected || !TryGetDouble(azimuthParam.Selection, OgcAngularUnit.DefaultRadians, out azimuth))
azimuth = 0;
double angleSkew;
if (!angleSkewParam.IsSelected || !TryGetDouble(angleSkewParam.Selection, OgcAngularUnit.DefaultRadians, out angleSkew))
angleSkew = 0;
var outputUnit = opData.StepParams.RelatedOutputCrsUnit;
double x,y;
if(xAtOriginParam.IsSelected || yAtOriginParam.IsSelected){
if (!xAtOriginParam.IsSelected || !xAtOriginParam.TryGetValueAsDouble(outputUnit, out x))
x = 0;
if (!yAtOriginParam.IsSelected || !yAtOriginParam.TryGetValueAsDouble(outputUnit, out y))
y = 0;
return new HotineObliqueMercator.VariantB(new GeographicCoordinate(lat, lon), azimuth, angleSkew, scaleFactor, new Vector2(x,y), spheroid);
}
else {
if (!offsetXParam.IsSelected || !offsetXParam.TryGetValueAsDouble(outputUnit, out x))
x = 0;
if (!offsetYParam.IsSelected || !offsetYParam.TryGetValueAsDouble(outputUnit, out y))
y = 0;
return new HotineObliqueMercator.VariantA(new GeographicCoordinate(lat, lon), azimuth, angleSkew, scaleFactor, new Vector2(x,y), spheroid);
}
}
