What R does scircle1 refer to?

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Alessandro Maria Laspina
回答： Samatha Aleti 2019-7-26
The scircle1 equation from the mapping toolbox has inputs in the form of latitude, longitude and R, which is defined as the arc length of the small circle. I don't understand if this is a spherical angle and where physically on the sphere cap it is defined. What I have is a sphere of radius R, and coordinates of the centers where I want to have small circles. Scircle 1 returns the latitude and longitude coordinates of the concentric circle on the sphere with the centerpoint defined. This is all well and proper but I don't know the R value.
Any help is appreciated thanks.

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Samatha Aleti
Samatha Aleti 2019-7-26
The variable “rad” in scircle1(lat0,lon0,rad) is the radius of the small circle that is to be drawn.
For more information, refer the following link
https://www.mathworks.com/help/map/ref/scircle1.html?s_tid=doc_ta

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