20000204: ivcord values

Mike,

The 5 known coordinates are stored as the numbers shown
since there are some special transformation GEMPAK can make with
those coordinates.

Any other coordinate can be stored as a packed integer, which is
how HAGL, HYBL, PAGE etc are represented. You should always convert
your coordinate name to the integer representation name using the
LV_CORD() subroutine- eg, you pass it PRES, it returns to the
number 2, you pass it HAGL and it returns a really long number
(doen't hard code in numbers...that guarantees things will break later).

To reverse the transformation, pass the numeric coordinate to
LV_CCRD.

Steve Chiswell
Unidata User Support



On Fri, 4 Feb 2000, Mike Trexler wrote:

> Chiz,
> 
> Thanks for the earlier help with my oversight.  My new question is...
> in the subroutine GD_WPGD, the values for IVCORD are quoted in
> the documentation to be:
> 
> C*      IVCORD          INTEGER         Vertical coordinate             *
> C*                                         0 = NONE                     *
> C*                                         1 = PRES                     *
> C*                                         2 = THTA                     *
> C*                                         3 = HGHT                     *
> 
> So what value does this take for other vertical coordinates, specifically
> for my question  Height Above Ground Level (HAGL)??
> 
> Thanks
> Mike
> 
> --
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