Projections.h File Reference

Include dependency graph for Projections.h:

Classes
class	vtProjection
struct	StatePlaneInfo
class	Geodesic
struct	EPSGDatum
class	GDALInitResult
class	GDALWrapper
Defines
#define	EARTH_RADIUS   6378000.0f
#define	METERS_PER_LATITUDE   111317.1f
#define	OCT   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
#define	DEFAULT_LOCATION_GDAL_DATA   "/usr/local/share/gdal/"
#define	DEFAULT_LOCATION_PROJ_LIB   "/usr/local/share/proj/"
#define	DEFAULT_LOCATION_PROJSO   "/usr/local/lib/"
Enumerations
enum	LinearUnits {   LU_DEGREES, LU_METERS, LU_FEET_INT, LU_FEET_US,   LU_UNITEDGE, LU_UNKNOWN }
Functions
const char *	DatumToString (int d)
const char *	DatumToStringShort (int d)
void	SetupEPSGDatums ()
StatePlaneInfo *	GetStatePlaneTable ()
int	GetNumStatePlanes ()
void	CreateSimilarGeographicProjection (const vtProjection &source, vtProjection &geo)
OCT *	CreateConversionIgnoringDatum (const vtProjection *pSource, vtProjection *pTarget)
OCT *	CreateCoordTransform (const vtProjection *pSource, const vtProjection *pTarget, bool bLog=false)
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
vtArray< EPSGDatum >	g_EPSGDatums
GDALWrapper	g_GDALWrapper

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Detailed Description

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Function Documentation

OCT* CreateConversionIgnoringDatum (  const vtProjection *  pSource, vtProjection *  pTarget )

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

OCT* CreateCoordTransform (  const vtProjection *  pSource, const vtProjection *  pTarget, bool  bLog )

Use this function instead of OGRCreateCoordinateTransformation to create a transformation between two vtProjections. 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 vtProjection adds to OGRSpatialReference.

void CreateSimilarGeographicProjection (  const vtProjection &  source, vtProjection &  geo )

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

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.

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