GMT

When plotting an arc segment in a custom symbol the documentation states that the arc command requires, among others, r. My experimentation shows however, that it seems to be rather the circles' diameter d than r.

For illustration I built a custom plot symbol using r=0.5 in the definition for the red quarter pie slice in the N-E quadrant and r=1 for the green quarter pie slice in the S-W quadrant. The blue vertical line is 1 unit long. I would have expected the red slice to have the appearance of the green slice. When compared to the blue line, the red r used for plotting appears to be 0.25 instead of 0.5.

Therefore I suspect the documentation to be erroneous in table custsymb. on page 265 in chapter 25.2.3 Macro commands of GMT_Docs.pdf Release 5.2.1 as it lists r instead of d as required argument for arc.

All the best,
Kristof