Re: To attach lats and lons to a set of points

Interpolation from randomly spaced data to a grid can be done via

  http://www.ncl.ucar.edu/Document/Functions/Contributed/natgrid_Wrap.shtml

or

http://www.ncl.ucar.edu/Document/Functions/Built-in/obj_anal_ic.shtml

Both can be slow.

On 8/14/12 11:27 AM, Noel Aloysius wrote:
> Hi Mary,
>
> Thanks for the reply.
>
> I want to use these 1200 points to create a 1x1 lat/lon gridded time
> series. Is there a way I can do this?
>
> Thanks,
> Noel
>
>
>
>
> On Tue, Aug 14, 2012 at 1:10 PM, Mary Haley <haley@ucar.edu
> <mailto:haley@ucar.edu>> wrote:
>
> Hi Noel,
>
> Did anybody ever respond to this?
>
> I'm not sure what you mean "attach" the spatial information so you
> can do analysis and plotting.
>
> I assume the lat/lon arrays are 1D of 1200 points? If so, there's no
> way to automatically attach this to the variable such that the NCL
> plotting or analysis routines will recognize them. We may add this
> as a future feature.
>
> If you are simply creating contour/map plots, then the way to
> indicate your lat/lon arrays is via the sfYArray and sfXArray resources:
>
> res@sfYArray = lat
> res@sfXArray = lon
>
> where "lat" and "lon" are your 1D arrays.
>
> You may also need to set:
>
> res@gsnAddCyclic = False
>
> --Mary
>
>
> On Aug 8, 2012, at 4:12 PM, Noel Aloysius wrote:
>
> > Hello NCL,
> >
> > I have a matrix of size flows = (/4,1200,120/) as (/var,
> location_id, time/).
> >
> > I have the lat/lon values for the location_id attribute in
> separate vectors. I would like to attach this spatial information to
> flows matrix in order to do some spatial analysis and create various
> maps.
> >
> > I would appreciate your guidance on this.
> >
> > Thanks,
> > Noel
> >
> > _______________________________________________
> > ncl-talk mailing list
> > List instructions, subscriber options, unsubscribe:
> > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
>
>
>
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Aug 14 12:49:29 2012