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

Include dependency graph for radii.c:

Functions
double	G_meridional_radius_of_curvature (double lon, double a, double e2)
	meridional radius of curvature More...

double	G_transverse_radius_of_curvature (double lon, double a, double e2)
	transverse radius of curvature More...

double	G_radius_of_conformal_tangent_sphere (double lon, double a, double e2)
	radius of conformal tangent sphere More...

Function Documentation

double G_meridional_radius_of_curvature	(	double	lon,
		double	a,
		double	e2
	)

meridional radius of curvature

Returns the meridional radius of curvature at a given longitude: $\rho = \frac{a (1-e^2)}{(1-e^2\sin^2 lon)^{3/2}}$

Parameters

Definition at line 73 of file radii.c.

References Radians, and dialogs::s.

double G_radius_of_conformal_tangent_sphere	(	double	lon,
		double	a,
		double	e2
	)

radius of conformal tangent sphere

Returns the radius of the conformal sphere tangent to ellipsoid at a given longitude: $r = \frac{a (1-e^2)^{1/2}}{(1-e^2\sin^2 lon)}$

Parameters

Definition at line 130 of file radii.c.

References Radians, and dialogs::s.

double G_transverse_radius_of_curvature	(	double	lon,
		double	a,
		double	e2
	)

transverse radius of curvature

Returns the transverse radius of curvature at a given longitude: $\nu = \frac{a}{(1-e^2\sin^2 lon)^{1/2}}$

Parameters

Definition at line 102 of file radii.c.

References Radians, and dialogs::s.

Functions