speed of polyline plot

Hi, there:

I am adding roads onto my contour plot by gsn_add_polyline. . My is domain state size. I already extracted the roads segements from the shape file downloaded from national atlas. Since there are still 2000 segments left for plotting, the time for one plot is about 2 min. I am plotting around 400 pictures, so the totally plotting time is unbearable (half day). gsn_add_shapefile_ploylines doesn¡¯t work. Is there a fast way to do it then?

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Lijun Diao
ldiao@uh.edu
Research Assistant
Department of Earth & Atmospheric Sciences
University of Houston
4800 Calhoun RD., Bldg. S&R1-312
Houston, TX 77204-5007

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Received on Sat Aug 10 15:48:20 2013