Small Circles and Ellipses

Define small circles and ellipses

Functions

`ellipse1`	Geographic ellipse from center, semimajor axes, eccentricity, and azimuth
`gcxsc`	Intersection points for great and small circle pairs
`scircle1`	Small circles from center, range, and azimuth
`scircle2`	Small circles from center and perimeter
`scircleg`	Small circle defined via mouse input
`scirclui`	GUI to display small circles on map axes
`scxsc`	Intersection points for pairs of small circles
`sectorg`	Sector of small circle defined via mouse input

This example shows how to generate and display small circles.

You can generate geographic line annotations, such as navigational tracks and small circles, interactively.