NEW RELEASE! GrADS 2.0.a6

[Jennifer Adams]

Dear All,
I have posted a new version of GrADS: 2.0.a6. The GrADS downloads web
page (http://iges.org/grads/downloads.html) has been updated with
links to the source code and a few pre-compiled binaries. Version
2.0.a6 is mostly a bug fix release, but it does have a couple of nice
new features:

1. The user can control the undef value in all GrADS output
This feature controls the undefined values printed to screen with the
'gxout stat' and the 'gxout print' output, as well as the undefined
values in fwrite, sdfwrite, and geotiff files. The output undef value
is controlled with the 'set undef' command. This feature changes the
default behavior of GrADS, but it is in keeping with the new undef
handling in GrADS 2.0. The default output undef value is -9.99e8. This
release works fine with GDS 2.0. I have written a documentation page.
Please READ THE DOCUMENTATION!
    http://grads.iges.org/grads/gadoc/gradcomdsetundef.html

2. The maximum number of user-defined colors has been increased from
99 to 255
To help you get started using 255 colors, I have written two scripts:
   ftp://grads.iges.org/grads/scripts/rgb255.gs  (defines a lot of
colors and draws a demo plot)
   ftp://grads.iges.org/grads/scripts/cbarm.gs   (draws a suitable
color bar)
Please feel free to copy and modify these scripts to suit your own
needs.

Here is the complete list of changes in 2.0.a6:

     Features:
     * Maximum number of user-defined colors increased from 99 to 255.
     * New commands "set undef" and "query undef" allow the user to
       control the undefined data value for all forms of GrADS output.
       This affects all the undefined values printed to screen in the
       'gxout stat' and 'gxout print' output, as well as the undefined
       values in fwrite, sdfwrite, and geotiff files.
       The default output undef value is -9.99e8.
       N.B. THIS FEATURE CHANGES THE DEFAULT BEHAVIOR OF GrADS!
     Bugs:
     * Fixed geotiff code to write out data in correct format
     * Fixed the background image option to printim
     * Fixed gancgrid I/O for variables with dimensions in a funky
order (i.e. not ETZYX)
     * Fixed gancgrid response if request is outside of file's bounds
     * Fixed 'close' command to properly reset defaults
     * Fixed gribmap printing debugging and error messages in verbose
mode
     * Replaced library function call SDiscoordvar in gasdf.c

     Misc:
     * more informative error messages when request is beyond file's
limits
     * added chsub option to xdfopen-style descriptors
     * added -n flag to gr2stn for nearest neighbor option
     * changed hard-coded undefs from -9.99e33 to -9.99e8
     * changed hard-coded XYBMAX from 500 to 5000 in gxshad.c
     * configure and src code changes to get rid of XLIBEMU
     * fixes to GUI configuration
     * bug fix in gaio.c to change vars lskip and lgrib to type g2int
     * changed var type to off_t and fixed? optimization issues for
x86_64 builds
     * changed Pixel to gaPixel
     * removed pcx11e.* from src directory
     * changed #include syntax for gabufr.h in grads.h


--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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