generate error ellipses from x,y coordinates, semi-major, semi-minor axes and ellipse orientation
generate error ellipses from x,y coordinates, semi-major, semi-minor axes and ellipse orientation
elps(x, y, a, b, theta = 90, conf = TRUE)
x |
x-coordinate, usually in projected units (km) |
y |
y-coordinate, usually in projected units (km) |
a |
ellipse semi-major axis (km) |
b |
ellipse semi-minor axis (km) |
theta |
ellipse orientation from north (degrees) |
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