EstablishDatumShift Method

WRAPPER_API bool EstablishDatumShift(CoordTransform &coordTransform, DatumShiftPreferences &shiftPrefs)

Description

The EstablishDatumShift method finds DatumShifts for the specified CoordTransform that coincide with the settings passed in the DatumShiftPreferences argument.  These DatumShifts are then stored in the CoordTransform::DatumShifts property.  This method returns a boolean value indicating the success of the operation.

See also the DataSource::GetValidDatumShifts method for selecting datum shifts.

Example

void DataSource_EstablishDatumShift(GeoCalcPBW::DataSource & data)

{

GeoCalcPBW::CoordTransform ct;

GeoCalcPBW::GeodeticCoordSys * source = data.GetGeodeticCoordSys(_towchar("BMG").c_str(), _towchar("WGS84_coordinate_system").c_str());

GeoCalcPBW::ProjectedCoordSys * target = data.GetProjectedCoordSys(_towchar("BMG").c_str(), _towchar("IA-27W").c_str());

ct.set_SourceCoordSys(*source);

ct.set_TargetCoordSys(*target);

GeoCalcPBW::DatumShiftPreferences shiftPrefs;

int opt = GeoCalcPBW::DatumShiftPreferences::ProcFlags::Direct |

GeoCalcPBW::DatumShiftPreferences::ProcFlags::ViaIntermediary |

GeoCalcPBW::DatumShiftPreferences::ProcFlags::IgnoreArea |

GeoCalcPBW::DatumShiftPreferences::ProcFlags::IgnoreMethod;

shiftPrefs.set_Options(opt);

if(! data.EstablishDatumShift(ct, shiftPrefs))

{

AfxMessageBox("EstablishDatumShift failed");

}

GeoCalcPBW::CoordPoint * sourcePt = ct.get_SourceCoordSys().get_PointStyle().CloneCoordPoint();

GeoCalcPBW::CoordPoint * targetPt = ct.get_TargetCoordSys().get_PointStyle().CloneCoordPoint();

sourcePt->set_InUnits(-14.27, 45.76);

if(! ct.ConvertAhead(*sourcePt, *targetPt))

{

AfxMessageBox("ConvertAhead failed");

}

delete source;

delete target;

delete sourcePt;

delete targetPt;

}