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20040712: gr_mnav

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  • Subject: 20040712: gr_mnav
  • Date: Mon, 12 Jul 2004 11:30:21 -0600
Ryan,

No there is nothing special.
Your angles for the PROJ look wrong however.

Your PROJ should look like: STR/90;-120;0
for example for a north polar projection ceneterd on -120 .

Steve Chiswell
Unidata User Support


>From: Ryan Torn <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200407121708.i6CH8MaW022185

>I am trying to convert some model output data to gempak that is on a 
>polar grid centered around the north pole.  I am using the gr_mnav 
>subroutine to build the navigation grid, but I seem to be having 
>problems creating a navigation that can be used to make plots.  Here is 
>the output from the gd_info with the navigation information:
>
>  GRID NAVIGATION:
>     PROJECTION:          STR
>     ANGLES:                70.0    15.0    90.0
>     GRID SIZE:           99  99
>     LL CORNER:              22.13   -165.00
>     UR CORNER:              22.13     15.00
>
>I think the problem is with the LL and UR latitude and longitude of the 
>model grid.  Is there something special I need to do for polar 
>stereographic plots for gr_mnav to work?
>
>Ryan
>
>-- 
>Ryan Torn
>Graduate Student
>Dept of Atmospheric Sciences
>University of Washington, Box 351640
>Seattle, WA 98195
>Phone 206-685-1851
>
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