rhumbline.c File Reference

#include <math.h>
#include <grass/gis.h>
#include "pi.h"

Include dependency graph for rhumbline.c:

Go to the source code of this file.

Functions

int G_begin_rhumbline_equation (double lon1, double lat1, double lon2, double lat2)
double G_rhumbline_lat_from_lon (double lon)


Function Documentation

int G_begin_rhumbline_equation ( double  lon1,
double  lat1,
double  lon2,
double  lat2 
)

Definition at line 28 of file rhumbline.c.

References PI, Radians, and tan().

double G_rhumbline_lat_from_lon ( double  lon  ) 

Definition at line 62 of file rhumbline.c.

References atan(), Degrees, PI, and Radians.


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