## Ellipse arc length

version 1.0.0.0 (1.78 KB) by
Computes the length of an ellipse arc given the two radiuses and the starting and ending angles.

Updated 02 Mar 2010

I had to compute the length of arcs of Earth's meridian. I noticed that there was no analytical solution for this so I wrote this very simple function.

It computes the arc length of an ellipse centered on (0,0) with radius a (along OX) and radius b (along OY)

x(t) = a.cos(t)
y(t) = b.sin(t)

with angle t (in radians) between t1 and t2.

The solution is obtained numerically by dividing the arc in small straight segments. In addition, the second output is the length of the complete ellipse compyted with an approximated formula (Ramanujan).

Luc

### Cite As

Luc Masset (2022). Ellipse arc length (https://www.mathworks.com/matlabcentral/fileexchange/26819-ellipse-arc-length), MATLAB Central File Exchange. Retrieved .

##### MATLAB Release Compatibility
Created with R2007b
Compatible with any release
##### Platform Compatibility
Windows macOS Linux