Classes
class	vtCRS

Macros
#define	EARTH_RADIUS 6378000.0f

#define	METERS_PER_LATITUDE 111317.1f

#define	OCTransform OGRCoordinateTransformation

#define	EPSG_DATUM_OLD_HAWAIIAN 6135

#define	EPSG_DATUM_PUERTO_RICO 6139

#define	EPSG_DATUM_NAD27 6267

#define	EPSG_DATUM_NAD83 6269

#define	EPSG_DATUM_WGS72 6322

#define	EPSG_DATUM_WGS84 6326

Typedefs
typedef scoped_ptr< OGRCoordinateTransformation >	ScopedOCTransform

Functions
const char *	DatumToString (int d)

const char *	DatumToStringShort (int d)

void	SetupEPSGDatums ()

StatePlaneInfo *	GetStatePlaneTable ()

int	NumStatePlanes ()

void	CreateSimilarGeographicCRS (const vtCRS &source, vtCRS &geo)

OCTransform *	CreateTransformIgnoringDatum (const vtCRS pSource, vtCRS pTarget)

OCTransform *	CreateCoordTransform (const vtCRS pSource, const vtCRS pTarget, bool bLog=false)

void	TransformInPlace (OCTransform *transform, DPolygon2 &poly)

void	TransformInPlace (OCTransform *transform, DLine2 &line)

double	EstimateDegreesToMeters (double latitude)

double	GetMetersPerUnit (LinearUnits lu)

const char *	GetLinearUnitName (LinearUnits lu)

double	MetersPerLongitude (double latitude)

bool	ReadAssociatedWorldFile (const char *filename_base, double params[6])

Variables
std::vector< EPSGDatum >	g_EPSGDatums

Function Documentation

OCTransform* CreateCoordTransform	(	const vtCRS *	pSource,
		const vtCRS *	pTarget,
		bool	bLog
	)

Use this function instead of OGRCreateCoordinateTransformation to create a transformation between two vtCRSs. Not only does it get around the 'const' issue with the arguments to the OGR function, but it also has a handy logging option, and can deal with any additional projections that vtCRS adds to OGRSpatialReference.

void CreateSimilarGeographicCRS	(	const vtCRS &	source,
		vtCRS &	geo
	)

Given a non-geographic projection, produce a geographic projection which has the same datum/ellipsoid values.

OCTransform* CreateTransformIgnoringDatum	(	const vtCRS *	pSource,
		vtCRS *	pTarget
	)

Create a conversion between projections, making the assumption that the Datum of the target is the same as the Datum of the source.

const char* DatumToString ( int d )

Convert an a Datum Code to a string of the Datum Name.

const char* DatumToStringShort ( int d )

Convert a Datum Code to a (short) string of the Datum Name.

double EstimateDegreesToMeters ( double latitude )

Determine an approximate conversion from degrees of longitude to meters, given a latitude in degrees.

const char* GetLinearUnitName ( LinearUnits lu )

Return a string describing the units.

double GetMetersPerUnit ( LinearUnits lu )

Return the number of meters for a given type of linear units

StatePlaneInfo* GetStatePlaneTable ( )

Provides access to the State Plane Table

double MetersPerLongitude ( double latitude )

Return number of meters per degree of longitude, at a given latitude.

bool ReadAssociatedWorldFile	(	const char *	filename_base,
		double	params[6]
	)

Read the contents of a world file. You can pass any filename, and it will look for the corresponding world file.

void SetupEPSGDatums ( )

Setup the global array of EPSG Datums, accessible as g_EPSGDatums.

Classes

Macros

Typedefs

Functions

Variables

Function Documentation