ChangeLog

2022-07-17 Version 2.2.3

    Updates:
    * Fixed attribute checking and variable setup for HDF5
    * Added support for netCDF attribute types USHORT, INT64, and UINT64
    * Added environment variable $GAGPY to specify name of GradsPy shared object file

    Misc:
    * Added the ChangeLog to the repository

2021-01-04 Version 2.2.2

    Features:
    * New GradsPy methods:
      'put' creates a defined variable in GrADS with data and metadata from Python
      'get' copies data and metadata from a GrADS defined variable into Python
    * GradsPy interface updated for Python3
    * New commands 'draw circ' and 'draw circf' (only available with Cairo)
    * Updated configure script and m4 scripts for udunits2, libshp, libreadline
    * Updated the HDF5 interface 
    * Retired the outxwd command

    Bug Fixes:
    * extended range of years in dayweek() so 'q time' returns a proper weekday

    Supplibs Update:
    * Linked with udunits-2.2.26 -- this requires new data files, udunits2*.xml
    * Linked with HDF5-1.10.6
    * Linked with readline-8.1

2018-04-25 Version 2.2.1

    Features:
    * GrADS is officially 30 years old!
    * New Python interface called GradsPy
    * Major configuration changes; all supplibs now linked dynamically
    * Added support for ^ and $ at the beginning of a shared object filename in UDPT entries
    * Added support for an optional fourth arg in UDPT entry for a function name alias
    * Added support for netcdf attributes of type STRING

    Bug Fixes:
    * Fixed bug in gr2stn() when station expression returns a NULL result
    * Fixed bug in 'set misswarn' when no files are open
    * Prevents attempts to use non-Hershey fonts when using the classic graphics plug-ins (X11/gd)

    New/Updated Documentation:
    * http://cola.gmu.edu/grads/gadoc/python.html
    * http://cola.gmu.edu/grads/gadoc/udpt.html

2017-09-05 Version 2.2.0

    Features:
    * Graphics display and printing are now handled as independent plug-ins.
        Cairo is the default, but the traditional X11 display (with widgets) and
	the old GD interface for image output are available as user-specified options.
	There is also no-op gxdummy plug-in for when no graphics capabilities are needed.
    * New arguments on startup for specifying graphics plug-in names (-d and -h)
    * New requirements for the User-Defined Plug-in Table: gxdisplay and gxprint
    * Overhaul of auto configuration protocol to support creation of shared libraries
	for the graphics plug-ins.
    * Added command 'q udpt' that lists all available plug-ins
    * Added command 'q gxconfig' that reports the configuration of graphics plug-ins
    * Updated the output from the 'q config' command
    * New command 'q font' returns information about a specific font
    * Added support in grib2scan to print model version date for PDTs 60 and 61
    * Added optional argument to 'q dbf' to specify a delimiter other than ","
    * Increased max number of block requests to raise limit on station data memory usage

    Bug Fixes:
    * Fixed bug to use an 8-byte integer to store a variable's offset in a file
    * Fixed bug in new shaded contour algorithm when plotting a range beyond the
	data maximum and csmooth is on.
    * Fixed routines handling netcdf4 cachesize so it resets if user adjusts scale factor
    * Fixed mismatched max length of variable description in descriptor files
    * Fixed bug when drawing zero-sized strings with Cairo

    New/Updated Documentation:
    * http://cola.gmu.edu/grads/gadoc/udp.html
    * http://cola.gmu.edu/grads/gadoc/udpt.html
    * http://cola.gmu.edu/grads/gadoc/plugins.html
    * http://cola.gmu.edu/grads/gadoc/supplibs2.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdgrads.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdqdbf.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdquery.html

    Supplibs Update:
    * Simplified the protocol for building, installing, and checking the supplibs
	in conjunction with changes to auto configuration scripts.
    * New documentation page: http://cola.gmu.edu/grads/gadoc/supplibs2.html
    * Updated the gadap library to version 2.1 to add support for a shared object
	and some minor fixes for compilation on newer versions of unix. 
    * Linked with pixman-0.34.0 and cairo-1.14.10
	
	
2017-02-14 Version 2.1.1.b0
	
    Features:
    * Added support for User Defined Plug-in functions which replace the old UDFs
    * Added support for logical operators in the expression syntax (gridded data only)
    * New function 'if()' performs an if/then/else expression evaluation
    * New scripting language function 'sys()' submits any command to the shell and 
	returns the resulting text stream that the command sends to standard output
    * New option '-4de' for the 'set sdfwrite' command 
    * New option for 'q define'	prints all the relevant information about a variable
    * New command 'set barbopts' to support filled pennant flags on wind barbs
	
    Misc:
    * Added support in gxprint for mixed case file names with the -f or -b option
    * Added descriptor file entry 'XYTRAILER' for files that have a trailer record 

    New/Updated Documentation:
    * http://cola.gmu.edu/grads/gadoc/udp.html
    * http://cola.gmu.edu/grads/gadoc/expressions.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncif.html
    * http://cola.gmu.edu/grads/gadoc/script.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetsdfwrite.html
    * http://cola.gmu.edu/grads/gadoc/descriptorfile.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdqdefine.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetbarbopts.html
	
    Supplib Update:	
    * Some builds are linked dynamically with OpenSSL to access data servers via HTTPS.
      This library may not always be needed or available, so builds without OpenSSL 
      have also been provided. 


2016-06-20 Version 2.1.0
	
    Features:
    * New command pdefwrite writes out internally calculated interpolation weights
    * Added support for GRIB2 PDTs 60 and 61 (Ensemble Reforecasts) 
    * Added support for a second undef attribute name for netcdf/hdf4 formats 
	sdfopen will look for "missing_value" (primary) and "_FillValue" (secondary)
	works with xdfopen-style and full descriptor files 
    * Previously undocumented command 'set misswarn' -- enables a warning message 
	with missing file names for templated data sets. 
	
    Bug Fixes:	
    * Fixed undef handling for BUFR station data
    * Fixed undef handling for station data when using -u and -a with const()
    * Closed infinite loop when parsing arguments to script function gsfpath() 	
    * Added support for transparent colors in KML output	
    	
    Misc:
    * Changed the logo to "GrADS/COLA" 
    * Output from sdfwrite command will use 'months since' or 'minutes since'
	in time axis metadata depending on what is used in the original data file
    * coll2gr() now supports the -u option with a vertical coordinate of height
	
    New Documentation Pages:
    * http://cola.gmu.edu/grads/gadoc/pdefwrite.html
    * http://cola.gmu.edu/grads/gadoc/setmisswarn.html

    Supplib Update:	
    * Linked with g2clib-1.6.0, jasper-1.900.1-ubuntu3.2debian
	
	
2015-03-10  Version 2.1.a3
	
    Features:
    * Added support for time template substitutions within a CHSUB string
    * Added support for GRIB2 PDTs 6 and 10 (Percentiles) 
	
    Bug Fixes:
    * Memory leak in metabuffer handling
    * Bad error message when netcdf chunksize is bigger than cachesize
    * Parsing error for files with time axis unit "minutes since..." 
    * Missing data handling in coll2grd function 	
    * Unnecessary re-initialization of font files 
    * Core dump when using non-existing data variables in a define expression
    * Memory leak for grids and stn reports when expression parsing fails

    Updated Documentation Pages:
    * http://cola.gmu.edu/grads/gadoc/descriptorfile.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsdfwrite.html
    * http://cola.gmu.edu/grads/gadoc/library.html
    * http://cola.gmu.edu/grads/gadoc/templates.html
  
    Supplib Update:	
    * Linked with netcdf-4.3.3
	

2014-05-27  Version 2.1.a2

    Features:	
    * Update option for gribmap (-u) has been restored
    * New options for gribmap to up/downgrade the index file version;
	this enables gribmap updates without having to rescan data files
    * New option for 'set sdfwrite' to specify an unlimited dimension
    * New option for 'set sdfwrite' to force a 3-dimensional output file
    * Added 'q fgvals' to return colors and values specified with 'set fgvals'
	
    Bugs:
    * Checks if hdf5 format is chunked before checking chunking parameters
    * Checks for valid image file before creating a custom tile

    Updated Documentation Pages:
    * http://cola.gmu.edu/grads/gadoc/fontcontrol.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdquery.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsdfwrite.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetbackground.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetfont.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetsdfwrite.html
    * http://cola.gmu.edu/grads/gadoc/gradutilgribmap.html
    * http://cola.gmu.edu/grads/gadoc/script.html
    * http://cola.gmu.edu/grads/gadoc/supplibs.html

    Supplib Updates:
    * Linked with zlib-1.2.8, hdf5-1.8.12, netcdf-4.3.2
	
	
2013-12-16  Version 2.1.a1
	
    Features:	
    * All the graphics, including the interactive X window display and 
	all image and hardcopy output, are now handled by the Cairo library.
    * New command 'gxprint' -- all-purpose printing command that handles all output formats
    * New hardcopy output options with gxprint: PDF and SVG
    * External utilities gxps, gxeps, gxtran are obsolete
    * Commands 'enable print', 'print', and 'disable print' are obsolete
    * The 'printim' command is now an alias for 'gxprint'
    * Added options to 'set rgb' to support transparent colors and patterns	
    * Added options to 'set font' to define new fonts
    * New command 'set hershey' -- enables generic fonts that are analogs of Hershey fonts 
    * New command 'set lwid' -- defines a new line thickness setting 
    * New command 'set tile' -- enables pattern filling for shaded contours
    * New command 'set antialias' -- temporarily disables anti-aliasing (not recommended)
    * The interactive display is always in color mode. The 'set display' command 
      is now only for swapping the background and foreground colors
    * Major redesign of the graphics code to make graphics rendering more "pluggable"
    * The widgets (buttons, drop menus, and rubber bands) have been temporarily disabled
	
    Misc:
    * Added new mark #12, a closed diamond
    * Added check for hPa unit in sdfopen
    * Added thickness option to 'set grid' command
	
    Bugs:
    * Fixed templating and array-indexing bugs for dtype hdf5_grid
    * Checks for NaN retured by pow() function
    * New metabuffer structure handles shapefiles with a very large number of vertices
	
    New Documentation Pages:
    * http://cola.gmu.edu/grads/gadoc/ascii.html
    * http://cola.gmu.edu/grads/gadoc/basemap.html
    * http://cola.gmu.edu/grads/gadoc/drawingtips.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdgxprint.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetantialias.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsethershey.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetlwid.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsettile.html
	
    Updated Documentation Pages:
    * http://cola.gmu.edu/grads/gadoc/colorcontrol.html
    * http://cola.gmu.edu/grads/gadoc/font.html
    * http://cola.gmu.edu/grads/gadoc/fontcontrol.html
    * http://cola.gmu.edu/grads/gadoc/gradcomddisableprint.html
    * http://cola.gmu.edu/grads/gadoc/gradcomddrawmark.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdenableprint.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdoutxwd.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdprint.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdprintim.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetannot.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetbackground.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetclopts.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetcmark.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetcthick.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetdisplay.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetfont.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetgrid.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetline.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetmap.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetmpt.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetrgb.html 
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetstring.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetxlopts.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetylopts.html
    * http://cola.gmu.edu/grads/gadoc/gradutilgxeps.html
    * http://cola.gmu.edu/grads/gadoc/gradutilgxps.html
    * http://cola.gmu.edu/grads/gadoc/gradutilgxtran.html
    * http://cola.gmu.edu/grads/gadoc/imageoutput.html
    * http://cola.gmu.edu/grads/gadoc/script.html
    * http://cola.gmu.edu/grads/gadoc/shapefiles.html
    * http://cola.gmu.edu/grads/gadoc/supplibs.html

	
Supplib Updates:	
    * Linked with cairo-1.12.16, pixman-0.28.0, freetype-2.4.10, fontconfig-2.9.0, Xrender-0.9.6,
	hdf5-1.8.11, netcdf-4.2.1.1, g2clib 1.4.0.
	
	
2012-11-9  Version 2.0.2

    Features:

    * New function amax() returns the maximum grid value over an X-Y region.
    * New function amaxlocx() returns the the X location of the maximum grid value over an X-Y region.
    * New function amaxlocy() returns the the Y location of the maximum grid value over an X-Y region.
    * New function amin() returns the minimum grid value over an X-Y region.
    * New function aminlocx() returns the the X location of the minimum grid value over an X-Y region.
    * New function aminlocy() returns the the Y location of the minimum grid value over an X-Y region.
    * New function atot() combines the latitude-weighting capability in aave() with the summing capability of asum().
    * New features added to lterp() based on regrid2() and re(): a bessel interpolation may be added 
      to the bilinear option, plus new options for an area average using aave or amean.
    * Added support for GRIB2 Probability & Aerosol products (Product Definition Templates 5, 9, and 48).
      These templates require a third set of codes in the variable declaration of the descriptor file.
    * grib2scan prints out relevant codes and suggests a variable declaration entry for descriptor file.
    * Colorization of scatter plots enabled by using a third argument: 'display x;y;c'.

    Misc:
    * For Robinson Projection, longitude may range from 0 to 360 as well as -180 to 180. 
    * Changed hard-coded 3.1415... to M_PI. 
    * Tweaks to verbose output from gribmap to help diagnose unmatched records.
    * When sdfopen/xdfopen is checking for Z axis, if pressure units of Pa is detected, units 
      will convert to mb automatically. Notice to user printed.

    Bugs:
    * Fixed I/O when reading 2-byte data.
    * Fixed EDEF handling in sdfopen/xdfopen. 
    * Fixed ensemble name parsing error.
    * Fixed sdfopen/xdfopen to reject files with 360-day calendar attribute.
    * Fixed streamlines to improve density handling for grid boxes that are very elongated, 
      such as at high latitudes, or in vertical cross sections.  

    New documentation pages:
    * http://cola.gmu.edu/grads/gadoc/gradcomdscreen.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetlog1d.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncamax.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncamaxlocx.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncamaxlocy.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncamin.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncaminlocx.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncaminlocy.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncatot.html
    * http://cola.gmu.edu/grads/gadoc/scatterplot.html

    Updated documentation pages:
    * http://cola.gmu.edu/grads/gadoc/descriptorfile.html
    * http://cola.gmu.edu/grads/gadoc/font.html
    * http://cola.gmu.edu/grads/gadoc/fontcontrol.html
    * http://cola.gmu.edu/grads/gadoc/functions.html
    * http://cola.gmu.edu/grads/gadoc/functionsatt.html
    * http://cola.gmu.edu/grads/gadoc/gadoc.html
    * http://cola.gmu.edu/grads/gadoc/gradcomddrawbutton.html
    * http://cola.gmu.edu/grads/gadoc/gradcomddrawwxsym.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdenableprint.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsdfwrite.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetccols.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetdefval.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetfont.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetgxout.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetvrange.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetvrange2.html
    * http://cola.gmu.edu/grads/gadoc/gradcomdsetwxcols.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncaave.html
    * http://cola.gmu.edu/grads/gadoc/gradfuncasum.html
    * http://cola.gmu.edu/grads/gadoc/gradfunclterp.html
    * http://cola.gmu.edu/grads/gadoc/gradutilgrib2scan.html
    * http://cola.gmu.edu/grads/gadoc/imageoutput.html
    * http://cola.gmu.edu/grads/gadoc/indexlist.html
    * http://cola.gmu.edu/grads/gadoc/library.html
    * http://cola.gmu.edu/grads/gadoc/mathfunctions.html
    * http://cola.gmu.edu/grads/gadoc/pagecontrol.html
    * http://cola.gmu.edu/grads/gadoc/shapefiles.html
    * http://cola.gmu.edu/grads/gadoc/supplibs.html
    * http://cola.gmu.edu/grads/gadoc/templates.html
    * http://cola.gmu.edu/grads/gadoc/tutorial.html

    Supplib Updates:
    * Linked with g2clib 1.4.0
				   

2011-10-25  Version 2.0.1

    Bug in gribmap: 
    * Fixed error when matching z-varying variables with different level types. 


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


2010-09-02  Version 2.0.a9

    Features:
    * Support for creating shapefiles with new commands: 
      set gxout shp, set shp, clear shp, set shpattr, q shpopts
    * New option "-ln" to "set kml" to write out a KML file containing contours 
      (this option is always enabled)
    * New forecast templates:
      %fn2  forecast minutes 
      %fhn  forecast time in hhnn (hours and minutes)
      %fdhn forecast time in ddhhnn (days, hours, and minutes) 
    * New option "-a" on startup to set the aspect ratio of the graphics page 
    * new option "-C" on startup to colorize text in command window
    Misc:
    * Default dimensions of printim changed to reflect page's aspect ratio
    * Files that are templated on E but not T do not have to be padded with missing data 
      if ensembles do not have same start/end times (for binary and SDF formats)
    * Change to "set sdfwrite" -- no dimension padding if -4d and -5d are not used
    * Support for grib files with time unit code 13 or 14 for 15-min and 30-min increments
    * Updated doc files in src distribution
    * Changes to configuration scripts
    Bugs:
    * fixed color selection for shaded plots: lev1 < val <= lev2
    * Default cache size set properly with sdfopen
    * Forecast hours no longer round up when forecast minutes > 30
    * "gxout stnmark" now draws reports at locations exactly equal to min/max lon/lat 
    * handles grib2 records with junk bytes prefixed

2010-03-26  Version 2.0.a8

    Features:
    * Single executable called "grads" is now fully-enabled
    * Support for indexing grib and grib2 files that are > 2Gb
    * Support for reading/drawing Shapefiles
      new commands: 'draw shp', 'q shp', 'q dbf', and 'set shpopts'
    * Support for reading/writing compressed netcdf-4
      new commands: q cache, q cachesf, set cachesf, set chunksize
      new options to 'set sdfwrite': -nc3/-nc4, -chunk, -zip, -flt/-dbl
      new descriptor file entry: CACHESIZE
    * New graphics output option: 'set gxout imap' 
      Quickly draws shaded grid boxes just like 'gxout grfill', but
      the metafile is not updated so printim and print will not work.
      Useful for interactive display of high resolution data. 
    Misc:
    * Added template substitution strings %t4, %t5, %t6, %tm4, %tm5, %tm6
    * Enabled -b option in gribmap for GRIB2 files
    * Mods to gribmap and wgrib for handing ECMWF GRIB1 files 
      with long record lengths
    * Improvements to HDF5 interface to speed up performance
    * New command 'q contours' returns contour colors and levels


2009-08-04  Version 2.0.a7.1
	    
    Features:
    * New interface for the HDF5 data format
    * New options for templating on Julian Day and Time axis indices
    * New "offt" syntax for variable specification to express time as an 
      offset from the variable's initial time instead of an absolute value
    * New function eloop() for obtaining E-varying results from expressions 
      that are unable to operate when E is a varying dimension
    * New option for contour labels: 'set clab masked'
      This creates gaps in the contour lines for the labels, so rectangles 
      for the label background are not drawn; contour labels never overlap.

    Misc:
    * Fixed sdfopen/xdfopen to detect only those data variables whose 
      dimensions match all of the grid dimensions
    * Added isnan() and isinf() tests at initial I/O 
	
    Bugs: 
    * Fixed bug in original release of 2.0.a7 for non-templated HDF datasets.
     

2009-06-02  Version 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


2009-02-04  Version 2.0.a5

    Features:
    * New graphics output options for creating GeoTIFF and KML formatted files
      'set gxout geotiff'   (generates a GeoTIFF data file)
      'set geotiff'         (sets output filename root and other characteristics)
      'set gxout kml'       (generates a TIFF image file and a companion KML text file)
      'set kml'             (sets output filename root)

    Bugs: 
    * PDEF lcc now works properly in the Southern Hemisphere
    * sdfwrite output has correct time axis units

    Misc:
    * Added support for templating on T but not E for self-describing files
    * Added support for optional padding of sdfwrite output to include fixed dimensions
    * Added check in gribmap for non-supported grib2 product definition templates
    * Added support for jpeg image output format with printim


2008-12-31   Version 2.0.a4

    Bugs:
    * Fixed function stnave(): error occurred when setting undef mask for result 
      if some reports were missing. Led to incorrect averages!!
    * Fixed function asum(): error occurred when setting undef mask for final result.
      Led to answer being always undefined!!
    * Fixed seg fault for non-templated netcdf files when X dim wraps the globe
      and other dims are fixed.
    * No precision errors for some hourly GDS data sets. 

    Misc:
    * 'set frame circle' now works for orthograhic projections
    * Support for grib2 grid 204 (curvilinear orthogonal)
    * The color of a constant grid is whatever 'set ccolor' is, instead of being fixed red
    * The 'q ctlinfo' and 'q file' output is enhanced and more accurate. 
      (This one helps GDS 2.0 know when a data set is 4D or 5D.)
    * Create postscript output from inside GrADS using 'print' command without 'enable print'

  
2008-08-12   Version 2.0.a3
    
    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.


2008-04-28   Version 2.0.a2

    Features:
    * ready for use with GDS-2.0 to access 5-dimensional data sets via OPeNDAP
    * support for thinned grib2 grids
    * gribmap has -0 option for grib2
	* allows non-float data types for hdf coordinate axes

    Bug Fixes:
    * memory leak when replacing an existing defined variable
    * multiple fixes for netcdf/hdf handling (templating, zrev, %nodim%, et al.)
    * contour interval and label handling for double precision
    * changed 'query dims' output for Ensembles
    * fixed gribmap's handling of data sets templated over T but not E


2008-02-13   Version 2.0.a1

    Bug Fixes:
    * detection of linear and wrapping axes for netcdf files opened with sdfopen
    * GRIB2 grids that have a bitmap were being drawn upside down
    * display for gxout=model and gxout=grid
    * handling of templated netcdf data sets opened with xdfopen
    * detection of unlimited axis in hdf files opened with sdfopen
    * reading PDEF files
    * creating gribmap index files >250mb
    * added some debug statements for detection of errors in calls to seekgb() in the grib2c library


2008-01-25   Version 2.0.a0

    Initial release of GrADS 2.0.
    * new fifth (ensemble) dimension for gridded data sets
    * supports GRIB2 formatted data
    * new external utility 'grib2scan'
    * internal data handling is all double precision
    * undef handling completely reimplemented
    * new function "lterp" for linear interpolation
    * new exectuable names: grads and gradsdap
    * no LATS interface, no UDFs