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20040811: ETA GRID OUTPUT

Charles,

You can specify the lat/lon corners in GAREA for the region to be displayed.
The actual model projection is:
PROJ=LCC/25;-95;25
GAREA=12.190;-133.459;57.328;-49.420

which can also be obtained with:
PROJ=LCC/25;-95;25
GAREA=grid

If you use the LCC proj ofthe grid, the rows and columns of the grid will
be straight lines on the map projection.

To enlarge the displayed area in the case of a STR as you describe, you
could use:
proj = str/90;-95;0
garea = 7.8;-125.0;45.0;-27.2

The easiest was to select the region you desire is to display the image with
GAREA=nam, PROJ=def as you mention, then use the "CURSOR GAREA" command
to draw a rubber band box and get the GAREA that way.

Steve Chiswell
Unidata User SUpport






>From: "Charles J. Alonge" <address@hidden>
>Organization: SAIC - NASA Goddard Space Flight Center
>Keywords: 200408111813.i7BID0aW002686

>Hello Support,
>
>     I have grib files that are projected on the 12 km Arakawa-E grid.  
>I have converted them using nagrib and they plot fine.  However, I'm 
>having trouble displaying the data in a stereographic projection.   I 
>have tried all of the various projections and the only one that looks 
>semi decent is the Polar stereographic with GAREA set to nhem.  The 
>problem with this is that the plotted data region is small.  I would 
>basically like to have the entire grid displayed in a stereographic 
>projection.  When I use garea = nam with the polar stereographic 
>projection (proj=str/90;-110;0) it looks good but the southwestern edges 
>are cut off.  Would you happen to have any suggestions?
>
>Charles
>
>-- 
>
>Charles J. Alonge
>SAIC - NASA Goddard Space Flight Center
>Hydrological Sciences Branch
>NASA-GSFC Mail Code 974.1
>Greenbelt, MD 20771
>
>Office: Building 22, Room 008
>Phone:  (301) 286-8272
>Fax:    (301) 286-8624
>Email:  address@hidden
>
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