public static ProjectionInfo CreateProjection(ICrsProjected crsProjected)
{
if (crsProjected == null) throw new ArgumentNullException("crsProjected");
Contract.Ensures(Contract.Result<ProjectionInfo>() != null);
var result = ProjectionInfo.FromProj4String(String.Empty);
result.Name = crsProjected.Name;
if (crsProjected.Authority != null) {
int epsgCode;
if (crsProjected.Authority.Name == "EPSG" && Int32.TryParse(crsProjected.Authority.Code, out epsgCode))
result.EpsgCode = epsgCode;
result.Authority = crsProjected.Authority.Name;
}
var geographicBase = (crsProjected.BaseCrs as ICrsGeodetic) ?? (crsProjected as ICrsGeodetic);
if (geographicBase != null)
result.GeographicInfo = Proj4CrsGeographic.CreateGeographic(geographicBase);
var projectionInfo = crsProjected.Projection as IParameterizedCoordinateOperationInfo;
if (projectionInfo == null)
return result;
var projectionMethod = projectionInfo.Method;
if(projectionMethod == null)
throw new InvalidOperationException("No projection method.");
var proj4Name = ToProj4MethodName(projectionMethod.Name);
IUnit geographicUnit = geographicBase == null ? null : geographicBase.Unit;
IUnit projectionUnit = crsProjected.Unit;
if (projectionUnit != null)
result.Unit = Proj4LinearUnit.ConvertToProj4(projectionUnit);
switch (proj4Name) {
case "stere":
ApplyParametersStere(result, projectionInfo.Parameters);
break;
default:
ApplyParametersDefault(result, projectionInfo.Parameters);
break;
}
if (result.Zone.HasValue && proj4Name == "tmerc")
proj4Name = "utm";
if (!TransformManager.Transforms.Exists(x => x.Proj4Name == proj4Name)) {
if (GeodeticOperationNameRegex.IsMatch(proj4Name)) {
proj4Name = "longlat";
}
else {
throw new InvalidOperationException();
}
}
switch (proj4Name) {
case "omerc": {
var offsetXParam = new FalseEastingParameterSelector();
var offsetYParam = new FalseNorthingParameterSelector();
var xAtOriginParam = new EastingAtCenterParameterSelector();
var yAtOriginParam = new NorthingAtCenterParameterSelector();
var paramLookup = new NamedParameterLookup(projectionInfo.Parameters);
paramLookup.Assign(offsetXParam, offsetYParam, xAtOriginParam, yAtOriginParam);
if (offsetXParam.IsSelected || offsetYParam.IsSelected)
result.Transform = TransformManager.GetProjection("Hotine_Oblique_Mercator_Azimuth_Center");
else if(xAtOriginParam.IsSelected || yAtOriginParam.IsSelected)
result.Transform = TransformManager.GetProjection("Hotine_Oblique_Mercator_Azimuth_Natural_Origin");
else
result.Transform = TransformManager.GetProj4(proj4Name);
break;
}
default:
result.Transform = TransformManager.GetProj4(proj4Name);
break;
}
var finalResult = ProjectionInfo.FromProj4String(result.ToProj4String()); // TODO: fix this hack
/*finalResult.CentralMeridian = result.CentralMeridian;
finalResult.LongitudeOfCenter = result.LongitudeOfCenter;
finalResult.LatitudeOfOrigin = result.LatitudeOfOrigin;
finalResult.StandardParallel1 = result.StandardParallel1;
finalResult.StandardParallel2 = result.StandardParallel2;
finalResult.FalseEasting = result.FalseEasting;
finalResult.FalseNorthing = result.FalseNorthing;
finalResult.ScaleFactor = result.ScaleFactor;
finalResult.alpha = result.alpha;
finalResult.IsSouth = result.IsSouth;
finalResult.Zone = result.Zone;
finalResult.Unit = result.Unit;
if (result.GeographicInfo == null) { // NOTE: this is all so terrible
finalResult.GeographicInfo = null;
}
else {
if (finalResult.GeographicInfo == null) {
finalResult.GeographicInfo = result.GeographicInfo;
}
else {
finalResult.GeographicInfo.Datum.Spheroid = result.GeographicInfo.Datum.Spheroid;
}
}*/
return finalResult;
}
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);
}
}
