Small Circles and Ellipses

Define small circles and ellipses

Functions

`ellipse1`	Geographic ellipse from center, semimajor axis, eccentricity, and azimuth
`gcxsc`	Intersection points for great and small circle pairs
`scircle1`	Small circle from center and radius
`scircle2`	Small circle from center and point on perimeter
`scircleg`	Add small circle to `axesm`-based map using mouse
`scxsc`	Intersection points for pairs of small circles

Generate Small Circles
This example shows how to generate and display small circles.
Create Small Circle and Track Annotations on Maps Interactively
You can generate geographic line annotations, such as navigational tracks and small circles, interactively.