[gradsusr] Extracting the lat-lon points along the contour line

[Lyndz]

Hi Jennifer,

Thank you for the response.

Actually,  your suggestion is similar to what I did.
I saved the contour as a shapefile then extract the lat-lon from that using
GIS.

I think there is no direct method to do this.


Best,

Lyndz.






On Thu, Apr 25, 2019 at 8:07 PM Jennifer M Adams <jadams21 at gmu.edu> wrote:

> Hi, Lyndz —
> Try using ‘set gxout kml’ and ‘set kml -line’ and draw the one contour.
> Then you can parse the .kml file to get the lon,lat coordinates of each
> vertex along the contour line. It’s not a direct path to what you need, but
> it should work.
> —Jennifer
>
> > On Apr 24, 2019, at 9:39 PM, Lyndz <olagueralyndonmark429 at gmail.com>
> wrote:
> >
> > Dear GrADS experts,
> >
> > I have the following plot generated using GrADS.
> > The red line is the 0 contour line of meridional wind speed (vwnd).
> >
> > 'set gxout contour'
> > 'set t 'Tmin
> > 'set ccolor 9'
> > 'set clevs 0'
> > 'set cthick 6'
> > 'd vwnd(lev=925)'
> >
> > I would like to extract the lat-lon points along the contour line.
> > Is this possible in GrADS?
> > I'll appreciate any help.
> >
> > Sincerely,
> > Lyndz
> >
> > <Screenshot from 2019-04-25
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> --
> Jennifer Miletta Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> George Mason University
>
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