TGIS_CSProjAbstract.Datum property

DK for Delphi | GisCsProjections.TGIS_CSProjAbstract.Datum | Constructors | Fields | Methods | Properties

Geodetic datum used by this projection, defining the ellipsoid model and coordinate reference frame.

Available also on: .NET | Java | ActiveX | Python.

// Delphi
public
  property Datum : TGIS_CSDatum read write;

// C++ Builder
public:
  __property TGIS_CSDatum* Datum = {read, write};

PURPOSE: Store and change the datum used for coordinate system transformations.

BEHAVIOR: Setting this property updates both Datum and Ellipsoid state and calls datumChanged to let subclasses recalculate dependent values.

CONSTRAINTS: The datum must be valid. Changing it may invalidate cached projection math.