[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20031111: Backward compatibility issues updating Weather Symbols for McIDAS

>From:  McIDAS Help Desk <address@hidden>
>Organization:  SSEC
>Keywords:  200311111645.hABGjkOb028400 McIDAS weather symbol 


>The 30 year old McIDAS weather symbols need to be updated to meet WMO 
>standards. With the exception of SFCMG, all applications use weather 
>symbols drawn from hard coded data statements.  McIDAS-2004 applications 
>will follow WMO standards using updated weather symbols found in the 
>font files wxsymr*.bdf.
>Advantages for the new system:
>1) More up-to-date. Some of the symbols have changed over the past 30 years.
>2) Follows the standard Adobe BDF font definition.
>1) You cannot use GD to change the width of the new fonts (as is with 
>all other non-McIDAS fonts).
>2) Must adapt to new symbols. For instance, The 3 parallel line symbol 
>for fog is now 2 parallel lines (new WMO standard) and the calm symbol
>is now 2 concentric circles, previously it was a 'plus' symbol (again, 
>new WMO standard).
>1) Is the GD issue a problem for your site?

No.  Standardization should _always_ be viewed positively.

>2) The new symbols will be the default, does your site have backward 
>compatibility requirements to make old weather symbols available?

It is hard to talk for the entire Unidata community, but I would
venture to guess that they will be receptive to movement towards
international standards.

>3) If backward compatibility is required, we foresee users adding 
>FONT=MCOLDWXSYM (or something similar) to the command line of 
>applications (i.e., SFCPLOT WXS MID 12 FONT=MCOLDWXSYM). Is this an 
>acceptable option, do you have other suggestions that we may consider?

Since this paralles the support for new and old CHILL calculations,
I would say that it is acceptable.

>Please send you comments before November 21st.


* Tom Yoksas                                             UCAR Unidata Program *
* (303) 497-8642 (last resort)                                  P.O. Box 3000 *
* address@hidden                                   Boulder, CO 80307 *
* Unidata WWW Service                             http://www.unidata.ucar.edu/*

NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.