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# angular Distance

Returns the "distance" in radians (about the spheres centre) between two positions.
Controller: will

C++

## AngularDistance

 doubleangularDistance( const Position& start const Position& end )
Calculates the angular distance between two points on the surface of a sphere relative to the centre of the sphere.


where a and b are the start and end location.

### Example 1

#include <stdio.h>
#include <codecogs/maths/geometry/spherical/angularDistance.h>

int main()
{
Position start(10,-90);
Position end(45,20);
printf("Angular Distance in Radians = %lf", angularDistance(start, end));
return 0;
}
Output:
Angular Distance in Radians = 1.686437

### Parameters

 start the first Position [Latitude, Longitude]. end the second Position [latitude, Longitude].

### Returns

##### Source Code

Source code is available when you agree to a GP Licence or buy a Commercial Licence.

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## Distance

 doubledistance( const Position& start const Position& end double radToDist = 3437.7475 )
Applies a simple conversion to the distance calculated by angularDistance to give a more conventional measure of distance according to the specified conversion ratio. This is simple the circumference of the sphere divided by . For example, with the planet earth on degree is divided into 60, which is called 1 minute of arc. This is also one nautical mile. Therefore to convert radian to nautical miles (knots) you multiply by:


### Example 2

#include <stdio.h>
#include <codecogs/maths/geometry/spherical/angulardistance.h>

int main()
{
Position start(10,-90);
Position end(45,20);
printf("\nKnots = %lf", distance(start, end));
printf("\nMiles = %lf", distance(start, end, 3956.0881));
return 0;
}
Output:
Knots = 5797.543498
Miles = 6671.692101

### Parameters

 start the first Position [Latitude, Longitude]. end the second Position [latitude, Longitude]. radToDist Default Value = 3437.7475

### Returns

the distance to new position.
##### Source Code

Source code is available when you agree to a GP Licence or buy a Commercial Licence.

Not a member, then Register with CodeCogs. Already a Member, then Login.