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Small Circles and Ellipses

Define small circles and ellipses


ellipse1Geographic ellipse from center, semimajor axis, eccentricity, and azimuth
gcxscIntersection points for great and small circle pairs
scircle1Small circle from center and radius
scircle2Small circle from center and point on perimeter
scirclegAdd small circle to axesm-based map using mouse
scxscIntersection points for pairs of small circles