private Helmert7Transformation ExtractHelmert7Transformation(EpsgCoordinateTransformInfo transform)
{
var method = transform.Method;
Contract.Assume(method != null);
var compiler = new StaticCoordinateOperationCompiler();
var compileRequest = new CoordinateOperationCrsPathInfo(
new[] { transform.SourceCrs, transform.TargetCrs },
new[] { transform });
var compileResult = compiler.Compile(compileRequest);
if (compileResult == null)
{
return(null);
}
var transformSteps = (compileResult as IEnumerable <ITransformation>) ?? ArrayUtil.CreateSingleElementArray(compileResult);
var exposedSteps = transformSteps.Select(step => {
if (step is GeocentricTransformationGeographicWrapper)
{
return(((GeocentricTransformationGeographicWrapper)step).GeocentricCore);
}
return(step);
});
foreach (var step in exposedSteps)
{
if (step is Helmert7Transformation)
{
return(step as Helmert7Transformation);
}
if (step is GeocentricTranslation)
{
return(new Helmert7Transformation(((GeocentricTranslation)step).Delta));
}
if (step is GeographicGeocentricTranslation)
{
return(new Helmert7Transformation(((GeographicGeocentricTranslation)step).Delta));
}
}
return(null);
}
private Helmert7Transformation ExtractHelmert7Transformation(EpsgCoordinateTransformInfo transform)
{
var method = transform.Method;
Contract.Assume(method != null);
var compiler = new StaticCoordinateOperationCompiler();
var compileRequest = new CoordinateOperationCrsPathInfo(
new[] { transform.SourceCrs, transform.TargetCrs },
new[] { transform });
var compileResult = compiler.Compile(compileRequest);
if (compileResult == null)
return null;
var transformSteps = (compileResult as IEnumerable<ITransformation>) ?? ArrayUtil.CreateSingleElementArray(compileResult);
var exposedSteps = transformSteps.Select(step => {
if (step is GeocentricTransformationGeographicWrapper) {
return ((GeocentricTransformationGeographicWrapper)step).GeocentricCore;
}
return step;
});
foreach (var step in exposedSteps) {
if (step is Helmert7Transformation) {
return step as Helmert7Transformation;
}
if (step is GeocentricTranslation) {
return new Helmert7Transformation(((GeocentricTranslation)step).Delta);
}
if (step is GeographicGeocentricTranslation) {
return new Helmert7Transformation(((GeographicGeocentricTranslation)step).Delta);
}
}
return null;
}
