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GTIFDefn Struct Reference

#include <geo_normalize.h>

List of all members.

Public Attributes
short	Model
short	PCS
short	GCS
short	UOMLength
double	UOMLengthInMeters
short	UOMAngle
double	UOMAngleInDegrees
short	Datum
short	PM
double	PMLongToGreenwich
short	Ellipsoid
double	SemiMajor
double	SemiMinor
short	ProjCode
short	Projection
short	CTProjection
int	nParms
double	ProjParm [MAX_GTIF_PROJPARMS]
int	ProjParmId [MAX_GTIF_PROJPARMS]
int	MapSys
int	Zone

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Detailed Description

Holds a definition of a coordinate system in normalized form.

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Member Data Documentation

short GTIFDefn::CTProjection

GeoTIFF identifier for underlying projection method. While some of these values have corresponding vlaues in EPSG (Projection field), others do not. For example CT_TransverseMercator.

short GTIFDefn::Datum

Datum from GeogGeodeticDatumGeoKey tag. For example Datum_WGS84

short GTIFDefn::Ellipsoid

Ellipsoid identifier from GeogELlipsoidGeoKey. For example Ellipse_Clarke_1866.

short GTIFDefn::GCS

From GeographicTypeGeoKey tag. For example GCS_WGS_84 or GCS_Voirol_1875_Paris. Includes datum and prime meridian value.

int GTIFDefn::MapSys

Special zone map system code (MapSys_UTM_South, MapSys_UTM_North, MapSys_State_Plane or KvUserDefined if none apply.

short GTIFDefn::Model

From GTModelTypeGeoKey tag. Can have the values ModelTypeGeographic or ModelTypeProjected.

short GTIFDefn::PCS

From ProjectedCSTypeGeoKey tag. For example PCS_NAD27_UTM_zone_3N.

short GTIFDefn::PM

Prime meridian from GeogPrimeMeridianGeoKey. For example PM_Greenwich or PM_Paris.

double GTIFDefn::PMLongToGreenwich

Decimal degrees of longitude between this prime meridian and Greenwich. Prime meridians to the west of Greenwich are negative.

short GTIFDefn::ProjCode

Projection id from ProjectionGeoKey. For example Proj_UTM_11S.

double GTIFDefn::ProjParm[MAX_GTIF_PROJPARMS]

Projection parameter value. The identify of this parameter is established from the corresponding entry in ProjParmId. The value will be measured in meters, or decimal degrees if it is a linear or angular measure.

int GTIFDefn::ProjParmId[MAX_GTIF_PROJPARMS]

Projection parameter identifier. For example ProjFalseEastingGeoKey. The value will be 0 for unused table entries.

short GTIFDefn::Projection

EPSG identifier for underlying projection method. From the EPSG TRF_METHOD table.

double GTIFDefn::SemiMajor

The length of the semi major ellipse axis in meters.

double GTIFDefn::SemiMinor

The length of the semi minor ellipse axis in meters.

short GTIFDefn::UOMAngle

The angular units of the GCS.

double GTIFDefn::UOMAngleInDegrees

One UOMAngle = UOMLengthInDegrees degrees.

short GTIFDefn::UOMLength

From ProjLinearUnitsGeoKey. For example Linear_Meter.

double GTIFDefn::UOMLengthInMeters

One UOMLength = UOMLengthInMeters meters.

int GTIFDefn::Zone

UTM, or State Plane Zone number, zero if not known.

int GTIFDefn::nParms

Number of projection parameters in ProjParm and ProjParmId.

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The documentation for this struct was generated from the following file:

• geo_normalize.h

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