geo_calculations.h File Reference

#include <cfe/gpstypes.h>

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Functions
long double	calculate_distance (lat_t lat1_deg, lng_t lng1_deg, alt_t ele1, lat_t lat2_deg, lng_t lng2_deg, alt_t ele2) __attribute__((const))
float	calculate_incline (long double dst, alt_t d_ele) __attribute__((const))

Function Documentation

calculate_distance()

long double calculate_distance	(	lat_t	lat1_deg,
		lng_t	lng1_deg,
		alt_t	ele1,
		lat_t	lat2_deg,
		lng_t	lng2_deg,
		alt_t	ele2
	)		const

Calculate the distance between to points on the surface of earth. This function uses Vincenty formula.

Parameters

[in]	lat1_deg	Latitude of point A in degrees.
[in]	lng1_deg	Longitude of point A in degrees.
[in]	ele1	Altitude of point A in meters.
[in]	lat2_deg	Latitude of point B in degrees.
[in]	lng2_deg	Longitude of point B in degrees.
[in]	ele2	Altitude of point B in meters.

Returns

Distance between point A and B in meters.

calculate_incline()

float calculate_incline	(	long double	dst,
		alt_t	d_ele
	)		const

Calculate the incline.

Note

it does not matter which units are used as input as long as both parameters use the same unit.

Parameters

[in]	dst	Distance along the real path (e.x. road).
[in]	d_ele	Delta elevation, the height difference.

Returns

incline