Re: Plotting irregularly-spaced vectors on a map

Hi Rosemarie,

Can you provide us with your script and data so we can run it here:

     ftp ftp.cgd.ucar.edu
     <log in as "anonymous">
     <Use email address as password>
     cd incoming
     put <your NCL script>
     put <data>
     quit

Please note you can't list the contents of this directory, and we'll
need to have the exact name of the files in order to retrieve them.

Thanks,

--Mary

On Tue, 7 Aug 2007, Rosemarie Drummond wrote:

> I want to plot 40 irregularly-spaced vectors on a map of N America.
>
> I would be happy to plot them one at a time if I could find a routine to do
> that but all the routines I have found (eg gsn_csm_vector_map) want data on a
> lat-lon array with a minimum length of 3 in each direction, so I tried
> setting up a 2-D array of data, with zero magnitude except where I want the
> arrows.
> I split it up into sets of 4 and after much trial, I got 5 sets to plot ie
> 20 of the vectors.
>
> It keeps giving me errors
> " warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation
> for X axis failed: consider adjusting trXTensionF value
> warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation
> for Y axis failed: consider adjusting trYTensionF value
> warning:IrTransInitialize: error creating spline approximation for
> trXCoordPoints; defaulting to linear
> warning:IrTransInitialize: error creating spline approximation for
> trYCoordPoints; defaulting to linear"
>
> I have seen that other people have asked the same sort of question on
> ncl-talk but apart from a suggestion to try changing the values of
> trXTensionF and trYTensionF (I tried both large and small values) or
> plotting subsets of the data (which I tried as I mentioned above), I have not
> found a helpful answer.
>
>
> Any suggestions appreciated!
> Rosemarie Drummond
>
> --
> Dr Rosemarie Drummond
> rmarie_at_atmosp.physics.utoronto.ca
>
> _______________________________________________
> ncl-talk mailing list
> ncl-talk_at_ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
_______________________________________________
ncl-talk mailing list
ncl-talk_at_ucar.edu
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Aug 07 2007 - 09:32:14 MDT