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);
}