plot a circle

Hi,

I want to use

;Circle
          pmres = True
          pmres@gsMarkerColor = "Black"
          pmres@gsMarkerSizeF = 0.01
          pmres@gsMarkerThicknessF = 3
          pmres@gsMarkerIndex = 16
          gsn_polymarker(wks,map,-95.08,29.47,pmres)
          gsn_polymarker(wks,map,-93.22,30.13,pmres)

to make a big circle. But the circle looks like polygon

ftp://ftp.caps.ou.edu/users/yli/ike-dom-paper.pdf

Any suggestion is welcome.

Yongzuo

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Received on Tue May 17 10:54:32 2011