Re: [ferret_users] Gap in curvilinear fill plot

[Muyin Wang <muyin.wang@xxxxxxxx>]

Hi, Stephen:
I found this problem when I plot NCEP's reanalysis data. The problem is 
due to the grid of the data. For NCEP's data, the grid is 0-360 along 
the longitude, with 144 points. Since the grid box is defined by the 
middle of the point, then there was a gap between 357.5 and 360 when I 
use polar-projection in my plot. A easy way to fix this is define 
another grid with ending point being 362.5, and regrid the data to the 
new grid. You are not changing anything, but add an extra point at the 
end to have an overlapping grid.
Good luck!
Muyin

Stephen R. Guimond wrote:

> Hello,
>  I used the 3 arguement (curvilinear) fill command like so:
>
> fill speed,lon,lat  where speed,lon and lat are all two-dimensional 
> arrays.  The corresponding plot produces a gap in the data (see 
> attached image "fill_curvilinear.gif").  To check on this, I used the 
> go polymark/polygon command to plot scattered data and found that no 
> gap exists in the data (see attached image "polymark.gif").  Any idea 
> why the curvilinear version of fill is giving me this gap on my 
> image?  Also, just wondering if anyone has seen my last e-mail 
> entitled "Plotting wind data on cylindrical grid" ??
>
> Thanks Much,
>
> Steve
>
> =======================================================
> Stephen R. Guimond
> Graduate Research Assistant
> Center for Ocean-Atmospheric Prediction Studies (COAPS)
> Tallahassee, FL 32304
> =======================================================
>
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