New Release GrADS 2.0.a3

[Jennifer Adams]

I have posted a new version of GrADS: 2.0.a3. The GrADS downloads web
page (http://iges.org/grads/downloads.html) has been updated with
links to the source code and pre-compiled binaries for Macs and a few
64-bit linux flavors. Here's what new in this release:

     Features:
     * New set of commands for writing out netcdf files.
       'sdfwrite'       (creates the file, takes a defined variable
name as an argument)
       'set sdfwrite'   (sets the output filename, default is
grads.sdfwrite.nc)
       'query sdfwrite' (shows the output filename, format, and user-
specified attributes)
       'set sdfattr'    (sets attribute metadata for the output file)
       'clear sdfwrite' (resets the sdf output filename and releases
any attributes)
     * Added "PDEF GENERAL" as an data-format independent alternative
to "PDEF FILE".

     Fixes:
     * Station data handling via OPeNDAP (enabled with libgadap)
works with GDS 2.0.
     * The stnmap utility does not seg fault when some templated data
files are missing.
     * Added PDEF handling for 2-D native HDF and NetCDF files
     * Data format dependence in PDEF FILE better documented;
       warning issued when data set that uses PDEF FILE is opened.
     * Memory leak in scorr().
     * The index files created by gribmap are portable
     * parsing of VECTORPAIRS entry in descriptor file does not seq
fault

     Misc:
     * Graphical display window is sized according to the height of
the display;
       portait is 90% of display height, landscape is 60%.
     * Changes to the configure tools to facilitate building from source
     * The sdfopen command handles files with "axis" attribute
     * Output from 'query config' more complete, contains some
supplib versions
     * Support for NetCDF and HDF files with spaces in the variable
names;
       substitute ~ for <space> in varname=>alias syntax.


This build has the initial implementation of the capability to write
out netCDF files. The interface is to set the desired dimension
environment, then define a variable, then 'sdfwrite' it:
     ga-> set lon ... lat ... lev ... time ... ens
     ga-> define newvar = var
     ga-> sdfwrite newvar
In this release, you can only write out one variable per file, and
you cannot append to an existing file. Later releases will have more
flexibility built in, but I wanted to get this initial implementation
out there for testing first. In the meanwhile, the workaround is to
write two files, then use the netcdf operators to merge them.

Documentation pages for the new commands are here:
http://iges.org/grads/gadoc/gradcomdsdfwrite.html
http://iges.org/grads/gadoc/gradcomdsetsdfwrite.html
http://iges.org/grads/gadoc/gradcomdsetsdfattr.html
http://iges.org/grads/gadoc/gradcomdqsdfwrite.html

I will be adding additional documentation to the Users Guide on how
to work with ensembles, how to write out data in various formats, how
to build from source, and other interesting topics.

Jennifer



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



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