Re: About Rivernetwork Plotting over South America usingNCL, Thanks!

Yes, you will need to upgrade to V5.1.1. Shapefile support was not
available in V5.1.0.

Please see:

http://www.ncl.ucar.edu/current_release.shtml

--Mary

On Sep 21, 2009, at 9:47 AM, Xiaoming Sun wrote:

>
> Dear Rick and Mary,
>
> Thank you very much for your reply!
>
> However, the NCL on my computer is NCL 5.1.0.
>
> So I have to update the NCL to 5.1.1 to get what I want?
>
> Thank you again for your help!
>
> Best Regards,
>
> Xiaoming
> *************************************************
> Xiaoming Sun
> 2417 CIEMAS Bldg.
> Department of Civil and Environmental Engineering
> Pratt School of Engineering
> Duke University
> Durham, NC, 27708, USA
> Phone: 919-660-5559 Fax: 919-660-5219
> E-mail: xiaoming.sun_at_duke.edu
> ************************************************* BODY { font-
> family:Arial, Helvetica, sans-serif;font-size:12px; }
>
> On Mon 09/21/09 12:27 PM , Mary Haley <haley_at_ucar.edu> wrote:
>
>
> Hi Xiaoming,
>
> If you have version 5.1.1 of NCL, then you can download the shapefile
> data file that's provided in the URL, and use the attached script
> "SouthAmerica.ncl" to plot the data, Please see the PNG image as well.
>
> There are over 8000 individual line segments being "added" to the map,
> which can be a bit time-consuming. If you don't need to resize your
> plot (like to panel it), then it will be faster to use "gsn_polyline"
> rather than "gsn_add_polyline". The wall clock time goes from about
> 50.5 seconds to 8.7 seconds.
>
> See the "SouthAmerica_faster.ncl" script for the faster version.
>
> --Mary
>
>
> On Sun, 20 Sep 2009, Xiaoming Sun wrote:
>
> >
> > Dear Sir or Madam,
> >
> > Thanks for reading this E-mail!
> >
> > I am trying to get some river network plotted over South America
> using
> > NCL.
> >
> > Although there is some data from
> > http://edc.usgs.gov/products/elevation/gtopo30/hydro/
> sa_streams.html">http://edc.usgs.gov/products/elevation/gtopo30/
> hydro/sa_streams.html
> > , it is in GIS format, which I am not familiar with.
> >
> > I am wondering whether there are any better or more convenient
> ways to
> > get the river network plotted over South America using NCL?
> >
> > Could you please give some suggestions?
> >
> > Thanks!
> >
> > Best Regards,
> >
> > Xiaoming
> >
> >
>
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Received on Mon Sep 21 2009 - 10:02:37 MDT