GeoRaster.cpp File Reference

#include "GeoRaster.h"

Functions
void	xy2offset (int x, int y, int64_t &offset, int dimensionX)
	get offset from pixel x/y offsets measured in number of values of datatype dimensionX is the total number of samples across the image More...
void	offset2xy (int &x, int &y, int64_t offset, int dimensionX)
	get pixel x/y from offset offsets measured in number of values of datatype dimensionX is the total number of samples across the image More...
void	xy2geo (int x, int y, GDALDataset *input, long double &geoX, long double &geoY)
	get georeferenced x,y from pixel x,y More...
void	geo2xy (int &x, int &y, GDALDataset *input, long double geoX, long double geoY)
	get pixel x,y from georeferenced x,y More...
char *	epsg2wkt (int epsg)
	get wkt projection from epsg code More...
void	render16to8bit (uint16_t *buffer16, size_t bufferLength, unsigned char *buffer8, double stretchCoeff)
	Render 16 bit values as 8 bit values. More...

Function Documentation

char* epsg2wkt

(

int

epsg

)

get wkt projection from epsg code

void geo2xy	(	int &	x,
		int &	y,
		GDALDataset *	input,
		long double	geoX,
		long double	geoY
	)

get pixel x,y from georeferenced x,y

void offset2xy	(	int &	x,
		int &	y,
		int64_t	offset,
		int	dimensionX
	)

get pixel x/y from offset offsets measured in number of values of datatype dimensionX is the total number of samples across the image

void render16to8bit	(	uint16_t *	buffer,
		size_t	bufferLength,
		unsigned char *	buffer8,
		double	stretchCoeff
	)

Render 16 bit values as 8 bit values.

Uses a linear stretch from 0 to max in the input buffer.

If stretchCoeff is not 1 the values will be scaled up or down by the coefficient (stretchCoeff*buffer[i])

8-bit values will saturate if the stretch render a value exceeding 255.

void xy2geo	(	int	x,
		int	y,
		GDALDataset *	input,
		long double &	geoX,
		long double &	geoY
	)

get georeferenced x,y from pixel x,y

void xy2offset	(	int	x,
		int	y,
		int64_t &	offset,
		int	dimensionX
	)

get offset from pixel x/y offsets measured in number of values of datatype dimensionX is the total number of samples across the image