Structure containing georeferencing information for transforming between geographic and projected/pixel coordinate systems. More...

#include <georef.h>

Public Attributes
int	status
	Status of the georeferencing (0 = valid, other values indicate errors)

int	count
	Number of reference points used.

int	order
	Polynomial order for the transformation (1, 2, or 3)

double *	tx
	Array of x-coordinates in target (typically pixel) space.

double *	ty
	Array of y-coordinates in target (typically pixel) space.

double *	lon
	Array of longitudes corresponding to reference points.

double *	lat
	Array of latitudes corresponding to reference points.

double *	pwx
	Polynomial coefficients for pixel-to-world longitude transformation.

double *	pwy
	Polynomial coefficients for pixel-to-world latitude transformation.

double *	wpx
	Polynomial coefficients for world-to-pixel x transformation.

double *	wpy
	Polynomial coefficients for world-to-pixel y transformation.

int	txmax
	Maximum x value in target space.

int	tymax
	Maximum y value in target space.

int	txmin
	Minimum x value in target space.

int	tymin
	Minimum y value in target space.

double	lonmax
	Maximum longitude in reference data.

double	lonmin
	Minimum longitude in reference data.

double	latmax
	Maximum latitude in reference data.

double	latmin
	Minimum latitude in reference data.

Detailed Description

Structure containing georeferencing information for transforming between geographic and projected/pixel coordinate systems.

This structure holds all necessary data to perform polynomial-based coordinate transformations between world coordinates (latitude/longitude) and target coordinates (typically pixels in a chart or image). It stores reference points, transformation coefficients, and boundary information used in the conversion process.

The structure supports transformations of different polynomial orders (1-3) with increasing accuracy and complexity. Polynomial coefficients are calculated using the Georef_Calculate_Coefficients() functions.

Definition at line 63 of file georef.h.

Member Data Documentation

◆ count

int GeoRef::count

Number of reference points used.

Definition at line 66 of file georef.h.

◆ lat

double* GeoRef::lat

Array of latitudes corresponding to reference points.

Definition at line 71 of file georef.h.

◆ latmax

double GeoRef::latmax

Maximum latitude in reference data.

Definition at line 84 of file georef.h.

◆ latmin

double GeoRef::latmin

Minimum latitude in reference data.

Definition at line 85 of file georef.h.

◆ lon

double* GeoRef::lon

Array of longitudes corresponding to reference points.

Definition at line 70 of file georef.h.

◆ lonmax

double GeoRef::lonmax

Maximum longitude in reference data.

Definition at line 82 of file georef.h.

◆ lonmin

double GeoRef::lonmin

Minimum longitude in reference data.

Definition at line 83 of file georef.h.

◆ order

int GeoRef::order

Polynomial order for the transformation (1, 2, or 3)

Definition at line 67 of file georef.h.

◆ pwx

double* GeoRef::pwx

Polynomial coefficients for pixel-to-world longitude transformation.

Definition at line 72 of file georef.h.

◆ pwy

double* GeoRef::pwy

Polynomial coefficients for pixel-to-world latitude transformation.

Definition at line 74 of file georef.h.

◆ status

int GeoRef::status

Status of the georeferencing (0 = valid, other values indicate errors)

Definition at line 64 of file georef.h.

◆ tx

double* GeoRef::tx

Array of x-coordinates in target (typically pixel) space.

Definition at line 68 of file georef.h.

◆ txmax

int GeoRef::txmax

Maximum x value in target space.

Definition at line 78 of file georef.h.

◆ txmin

int GeoRef::txmin

Minimum x value in target space.

Definition at line 80 of file georef.h.

◆ ty

double* GeoRef::ty

Array of y-coordinates in target (typically pixel) space.

Definition at line 69 of file georef.h.

◆ tymax

int GeoRef::tymax

Maximum y value in target space.

Definition at line 79 of file georef.h.

◆ tymin

int GeoRef::tymin

Minimum y value in target space.

Definition at line 81 of file georef.h.

◆ wpx

double* GeoRef::wpx

Polynomial coefficients for world-to-pixel x transformation.

Definition at line 76 of file georef.h.

◆ wpy

double* GeoRef::wpy

Polynomial coefficients for world-to-pixel y transformation.

Definition at line 77 of file georef.h.

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

/home/runner/work/main/main/opencpn/model/include/model/georef.h

Public Attributes