now if the same circle is surrounded by another circle with some space or gap in between them and the radius bigger than this circle, the region formed in between the two circles is basically the annulus. in the above figure, the blue shaded portion is the annulus. annulus meaning the ...
Figure 1.Location of the pistachio orchard in the ‘Castilla y León’ region, Spain. Coordinates: X: 341450.3, Y: 4589731.8; ETRS89/UTM zone 30N. Red polygon: UAV flight area. Blue polygon: area where the ground-truth measures were taken. ...