[gradsusr] * * * New Release GrADS Version 2.0.0 * * *

[Joey Woodson]

What's the difference between the two shading algorithms, other than
transparency? I thought shade2 would be faster, but it is actually
marginally slower (same map drawn in both cases). Any differences other than
transparency?

On Thu, Sep 29, 2011 at 9:34 AM, Jennifer Adams <jma at cola.iges.org> wrote:

> Brian and I are pleased to announce a new release of GrADS, version 2.0.0.
> We have worked very hard to make this version as stable as possible, and are
> therefore taking it out of alpha status, skipping over beta altogether, and
> calling it 'operational'. There is a very long list of new features, bug
> fixes and miscellaneous additions, the full text from the ChangeLog is
> below, please read it carefully.
>
> Highlights of this release, other than its stability, are a new shaded
> contouring algorithm (which allows for "transparent" colors), support for
> polygon shapefiles and KML files, and some fixes and improvements to the
> streamlines, including controls for spacing, style, and size of the arrows.
> There are also new versions of some of the supplibs, enabling the handling
> of GRIB2 product definition template 4.15, and optimizing the netcdf5/hdf5
> interface.
>
> The GrADS downloads web page (*http://iges.org/grads/downloads.html*<http://iges.org/grads/downloads.html>)
> has been updated with links to the source code and a few pre-compiled
> binaries. Binaries for additional operating systems will be posted as they
> become available.
>
> Please report any problems or questions to this forum. Enjoy!
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
> 2011-09-29  Version 2.0.0
>     Features:
>     * New shaded contouring algorithm: "set gxout shade2"
>       Polygons are closed, have no holes, do not overlap, and are as large and few in number as is feasible
>       Use of -1 for a color # will suppress drawing of the shaded contour, making it effectively transparent
>     * Legacy shaded contouring routine: "set gxout shade1"
>     * "set gxout shaded" is now an alias for legacy shaded contouring routine
>     * Support for creating polygon shapefiles with new option "-poly" to "set shp" command
>     * Support for creating polygon KML files with new option "-poly" to "set kml" command
>     * 1D loglog plots with new command "set log1d"
>     * New environment variable GASHP, contains 1 or more directories that may contain shapefiles.
>       GASHP delimiters are space, semicolon, comma, or colon. Algorithm is:
>         1. Tries to open filename as provided by user	
>         2. Parses GASHP and prepends each dir to filename
>         3. Prepends GADDIR directory (only one dir) to filename
>     * New command "set strmopts" to control streamline density plus arrowhead spacing, size, and type.
>       Support for negative streamline density values (between -10 and -1) for high-res grids.
>
>     Misc:
>     * Mixed case ensemble names are now allowed
>     * Changes to improve masked contour labeling; also now works with "set vpage"
>     * Support for grib1 time range indicator 7, which subtracts the forecast time
>       from the basetime to get the valid time
>     * Loosened restrictions in gribmap for mapping monthly data
>     * Previously undocumented command: "screen"
>     * Added "query calendar" command to discover calendar mode (unset, 365-day, or standard)
>     * Added ":" to list of delimiters for multiple dirs in GASCRP environment variable (now same as GASHP)
>     * Added "NULL" as an option for scale factor attribute name in the UNPACK descriptor file entry
>       when add offset occurs alone
>     * Updated wgrib.c to version 1.8.1.2a
>     * Updated grib2scan to show start/ending times for averages, and valid times for instantaneous fields
>     * Handles GRIB2 Product Definition Template 4.15
>     * Added aliases 'line' for 'ln' and 'point' for 'pt' in 'set shp' and 'set kml' commands
>     * Added alias 'image' for 'img' in 'set kml' command
>
>     Bugs:
>     * Fixed errors when retrieving data from a very large defined object that has more than 2Gb elements.
>     * Patched memory leak when reading NetCDF attributes with lengths larger than 128
>     * Patched memory leaks in cdiff(), gr2stn(), and coll2gr() functions and collect() command
>     * Cannot have a leap and no-leap file open at the same time
>     * Calendar mode cleared with "reinit" only
>     * Fixed big/little endian error when reading 2-byte binary data
>     * Fixed bug where 2-point contour segments are not drawn in upper right corner of grid
>     * Fixed contouring bug for very high res grids with vertices too close together to resolve graphically
>     * Fixed contouring bug for small grids that left a gap in contour line
>     * Added check for strictly increasing contour levels
>     * Fixed streamlines in areas where grid boxes are not square (e.g. near the poles)
>     * Disabled erroneous vector/barb drawing in some projections (mollweide, orthographic, and robinson)
>     * Fixed erroneous results from 'q xy2gr' for some projections (returns -999.9 instead of garbage)
>
>     Supplib Updates:
>     * Linked with jasper-1.900.1, g2clib 1.2.2, hdf5-1.8.7, netcdf-4.1.3, zlib-1.2.5
>
>
>
>
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>


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