Re: Contouring Station Data

Thanks for all the suggestions!

Would poisson_grid_fill work for station data? I guess I could make an
empty grid, set the points closest to each station to their values, and
then interpolate the rest?

   Carl

On Fri, Jun 29, 2012 at 2:47 PM, Mary Haley <haley@ucar.edu> wrote:

> Another possibility is to try poisson_grid_fill. Please see this page for
> some examples:
>
> http://www.ncl.ucar.edu/Applications/grid_fill.shtml
>
> Carl, this is a really nice example, even as is. If you want to add it to
> our examples page, let me know.
> This might be a good one for the station data page, the grid fill page, or
> even the text page.
>
> --Mary
>
>
>
> On Jun 29, 2012, at 12:14 PM, David Brown wrote:
>
> > Hi Carl,
> > I notice that you are using the AreaFill contour fill mode. You might
> get slightly better coverage of the edges if you use RasterFill instead.
> The areafill algorithm is more likely to leave out areas that are adjacent
> to fill values. You can use cell fill or raster fill with smoothing off to
> see the exact locations of the data you do have. Otherwise, I don't know of
> any solutions other than what you are proposing.
> > -dave
> >
> >
> > On Jun 29, 2012, at 9:13 AM, Carl Schreck wrote:
> >
> >> First off, thanks as always to the NCAR staff for being so responsive
> to our questions and maintaining this fantastic tool for us! Hopefully
> you've been making it through the heat and fires safely...
> >>
> >> I'm trying to draw contours of station data (see attached code, data,
> and image). The dataset I'm using does not extend all the way to the
> coasts, hence the missing values (gray) in southern Florida, eastern Maine,
> southern California, etc.
> >>
> >> I understand that NCL doesn't want to interpolate beyond the data, but
> has anyone developed a workaround for that? I'm considering padding it with
> artificial/interpolated data beyond the borders or the map. But I wanted to
> ask the community if they've tried anything else.
> >>
> >> Thanks!
> >> Carl
> >>
> >> --
> >> Carl J. Schreck III, PhD
> >> Postdoctoral Research Associate
> >> Cooperative Institute for Climate and Satellites (CICS-NC)
> >> North Carolina State University and NOAA's National Climatic Data Center
> >> 151 Patton Avenue
> >> Asheville, NC 28801
> >> Tel: 828-257-3140
> >> carl@cicsnc.org
> >> http://monitor.cicsnc.org/mjo/
> >> http://www.atmos.albany.edu/student/carl/
> >>
> >>
> <CurrentHrlyStationData.txt><map_cont.ncl><plot.png>_______________________________________________
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>

-- 
Carl J. Schreck III, PhD
Postdoctoral Research Associate
Cooperative Institute for Climate and Satellites (CICS-NC)
North Carolina State University and NOAA's National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801
Tel: 828-257-3140
carl@cicsnc.org
http://monitor.cicsnc.org/mjo/
http://www.atmos.albany.edu/student/carl/

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Received on Fri Jun 29 13:26:07 2012