TGIS_CSProjAbstract.Zone property

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

Zone number for UTM (Universal Transverse Mercator) projection. Typically 1-60 for longitude zones. Valid only for UTM-based projections.

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

// Delphi
public
  property Zone : Integer read write;

// C++ Builder
public:
  __property int Zone = {read, write};

PURPOSE: Specify which 6° longitude zone for UTM. Zone 1 centered at -177°, Zone 30 at -3°, Zone 31 at +3°, Zone 60 at +177°.

BEHAVIOR: Sets CentralMeridian automatically based on zone (e.g., Zone 33 → -15°). Range: 1-60. Setting zone changes CentralMeridian property.

USAGE: proj.Zone := 33; (for Central Europe)

CONSTRAINTS: Only for UTM projections. Values outside 1-60 may be silently clamped or ignored.