NEWS

News for version 1.16.5
* No news is good news.

News for version 1.16.4
* No news is good news.

News for version 1.16.3
* Updates to
* Swath dimension processing controls
* Compiler compatibility.
* Log usage and internal timing metrics.

News for version 1.16.2
Updates since 2020-02-06, mainly clean up compiler warnings.

News for version 1.16.1
Note: since the hyrax 1.13.2, HDF4 handler has been just treated as a BES module.
      The hyrax release version has been used.
Updates since 2019-07-09, mainly fix a memory leaking in the default option.

News for version 3.13.1

Updates since 2017-05-17, see the ChangeLog

News for version 3.13.0

Updates since 2017-05-15, see the ChangeLog

News for Hyrax 1.13.4

Updates since 2017-01-09, see the ChangeLog

News for version 3.12.3

Updates since 2016-09-23, see the ChangeLog

News for version 3.12.2

Updates since 2016-05-20, see the ChangeLog

News for version 3.12.1

Updates since 2016-01-07

Improve the calculation of XDim and YDim for the sinusodial projection

Bug fix for the case when the _FillValue is NaN. More information,
please check "Updated for version 3.12.1" in README.

News for version 3.12.0

Minor updates, see the ChangeLog

News for version 3.11.9

Minor updates, see the ChangeLog

Version 3.11.8

Add 1-D horizontal CF cv variables and corresponding CF attributes for
the HDF-EOS2 sinussoidal projection products.

Improve the performance of special NASA products: 

 * Fixes a bug when casting values via pointers between different
   datatypes. This is revealed via gcc 4.8.2 at CentOS 6.

 * Fixes the missing attributes under "Geolocation Fields" of HDF-EOS2
   swath.

 * Also fixes a bug to access TRMM version 7 3A25 products.

Version 3.11.7 (15 September 2015)

  Added DDS/DAS cache support for AIRS version 6 products.
  Added data cache support for variables read by HDF SD interaces.
  Added 1-D coordinate variables and grid_mapping CF attributes for HDF-EOS2 Sinusoidal projection products.

Version 3.11.6 (15 November 2014)

  Added support for geo-location cache for HDF-EOS2 products.
  Implement an option not to pass file ids for the compatibility with NcML modules.
  Performance tuning for DDS/DAS builds
  Support the mapping of vgroup and HDF-EOS2 swath/grid object(vgroup-like) attributes to DAP.
     
Version 3.11.5 (25 April 2014)

  Fixed the mapping of 8-bit HDF4 data type to DAP2.

Version 3.11.4 (1 April 2014)

  Added support for TRMM version 7 products. 

Version 3.11.3 (1 February 2014)

  Optimized handler for MOD08 M3 and AIRS version 6 products with new BES keys.

Version 3.11.2 (18 October 2013)

  Works with libdap 3.12.1 and the documented behavior for BaseType::read().

Version 3.11.1 (10 September 2013)

  Internal code refinements.

Version 3.11.0 (30 May 2013)

  This version fixed several bugs in handling MODIS (including version 6) and 
MEaSUREs VIP products. It also improved the CF attributes handling such as 
valid_range and scale/offset and the archive metadata handling. It provides a 
new testsuite that users can download and test sample NASA files. The codes
 are cleaned up as well to improve readibility.

Version 3.10.1 (27 Nov 2012)

  This version changes the _FillValue datatype to be consistent with the 
variable datatype. This is not required by CF, however, netCDF-3 has this 
requirement. This change makes fileout_netcdf work smoothly for some NASA 
products.


Version 3.10.0 (30 Sep 2012)

  Added BESkey for enabling CF option. 

  Fixed many bugs in handling NASA products under CF option.

  Using HDF-EOS2 library is now optional for pure HDF4 products to genereate
outputs that meet CF-conventions. Configuring with HDF-EOS2 library is
strongly recommended for all HDF-EOS2 products and HDF4+HDF-EOS2 hybrid 
products.

  Please read README for new features, bug fixes, limitations and known issues.

Version 3.9.4 (19 Jan, 2011)

  Fixed the bug in uint16/uint32 type attribute handling.

  Correced the handling the scale/offset for MODIS products because the 
MODIS scale/offset equation is quite different from the CF standard.

  Added the support for LAMAZ projection data.

  Fixed memory release error that occurs on iMac (OS X Lion) with the STL 
string:string Map.

Version 3.9.3 (21 Aug. 2011)

  Fixed tickets 1793 (HDF-EOS parse error when the hanfdler is not
linked with the hdf-eos2 library) and 1797 (dim_0 attribute container
added twice to the same variable); these two issues caused a host of
problems so other bugs like the gateway not working or the netcdf
fileout ersponse not working (for hdf4 files) are now fixed.

Version 3.9.2 (17 Mar. 2011)

  Build fixes, particularly for HDF-EOS2 on OS/X

  Support the extra SDS objects for a hybrid HDF-EOS2 files.

  Add support to treat HDF-EOS2 files as HDF4 files(for MERRA data)

  Add support for HDF4 files that use SDS dimension scales. The HDF4
files should kind of follow CF conventions. I have to patch for AVHRR
files. They use "unit" instead of "units".

Version 3.9.1.eospatch (16 Mar 2011)

  This is the 3.9.0 handler with build updates for libdap 3.11 and bes 3.9

Version 3.9.1 (14 Sept 2010)

  This is the 3.9.0 handler with build updates for libdap 3.11 and bes 3.9

Version 3.9.0 (26 August 2010)

  The handler now supports the access of many NASA HDF-EOS2 and HDF4
products via visualization clients. To take advantage of this, one
must configure with the HDF-EOS2 library and use the correct RPMs.

Version 3.8.1 (5 May 2010)

  The handler now implements its own transfer_attributes code to merge
attributes from its DAS response into the DDS.

Version 3.8.0 (1 Feb 2010)

  Bug fixes from the last release.

Version 3.7.15 (5 Oct 2009)

  This version builds with the Hyrax 1.5.x libdap & bes and contains
special tests for HDF-EOS2 files. To use these options, or rather, to
build the handler so they are supported, use the --enable-cf and
--with-hdfeos2=<path to library> options to configure. In other words,
these options require that you not only have hdf4 present but that you
have the hdfeos2 library as well.

Version 3.7.14 (9 June 2009)

  Fix for the tests - missing baseline file.

  Fix for gcc 4.3 (missing include files)

Version 3.7.13 (12 May 2009)
  
  Build fix.

  String attributes now cache correctly - before quotes were being added to the
values. Also, it's now possible to turn off caching by setting hte value of
HDF4.CacheDir to an empty value (HDF4.CacheDir="").

Version 3.7.12 (8 April 2009)

  Many memory leaks found and fixed. A bug reported by Fan Fang where the
handler's performance degraded for large files accessed repeatedly has been
fixed. There re likely leaks still from opening the file, but that are
'fixed' size leaks.

version 3.7.11 (16 March 2009)

  Fixes for the constraint, service interface and XML responses.

Version 3.7.10 (29 Jan 2009)

  Bug fixes and updates for the new versions of libdap and bes.

Version 3.7.8 (14 March 2008)

  This version (3.7.8) contains a know problem when several SDSs use the same
name. This bug is encountered when a Vgroup contains a Vgroup and that inner
Vgroup contains an SDS, if that SDS's name matches the name of another SDS
nested in a *second set of objects with the same structure*, the 'first' SDS
will always be returned. This is ticket #905. Since this version of the
handler fixes a number of other problems, and this bug affects only a smal
number of data sets, we're releasing this version now and will release an
update in a few weeks. It's likely that this bug has been present for some
time if not since the handler was first written.

  OS/X Build improved.

  Many fixes, Escpecially in the error/exception processing software.

  Works with BES 3.6.0 (and thus as part of Hyrax 1.4).

Version 3.7.7 (14 Nov 2007)

  pkg and rpm build fixes

Version 3.7.6 (14 Nov 2007)

  Don't edit bes.conf during make install, but document the bes-hdf4-dap.sh
script and the bes-conf make target in README.

  pkg-config support added

  Various bug fixes.

Version 3.7.5 (13 March 2007)

  Added automatic configuration of the handler using 'make install.' Now the
handler is automatically configured in the bes.conf file in the default
location. Test data are also installed, so after installing this handler
Hyrax will have data to serve providing an easy way to test your new install
and to see how the a working bes.conf should look. To use this, make sure
that you first install the bes, and that dap-server gets intalled too.
Finally, every time you install or reinstall handlers, make sure to restart
the BES and OLFS.

Version 3.7.4

  Build fixes.

  Added test data.

Version 3.7.3

  Updates for the 1.4 release of Server 4. Also included are bug fixes, memory
leak fixes, and performance enhencements.

Version 3.7.2

  Now builds and works on OS/X

  Now works with the netcdf handler.

  Now the handler name is set inthe BES, not hardcoded here.

  Now builds as a (libtool) module

Version 3.7.1

  Build fixes (now finds the BES using the same logic as the netcdf and
freeform handlers).

  The hdfclass library is shared, not static to avoid a warning about potential
incompatibilities. 

  Fixes to the help response.

  Removed an extraneous directory.

Version 3.7.0

  The handler now builds with BES 3.1. The build makes a Server3 executable
(but has not been tested) and a Server4 shared object module.

  If the HDF4 handler's cache directory is not passed to the handler, the
default  is now to not cache the files. The old behavior was to throwing an
exception. 

Version 3.6.1

  The handler has never been very good about situations where the cache
directory is bad or missing. That is, if the handler was not told where to
write files it caches, it was writing them in same directory that holds the
data. The problem with this is/was that the server often does not have write
access to that directory. Furtermore, the server always cached parts of some
responses, even if built with the NO_CACHE compile-time option. Bummer. This,
combined with the first problem meant that a misconfigured server would often
crash (and return a particularly inscrutable error message as well). This has
been fixed. The server now checks to see if the cache directory is writable
and defaults to not caching DAS and DDS objects when caching won't work. This
does degrade the performance of the server, so an error message is written to
the httpd error log.

Version 3.6.0

  Due to a fix in the handling of HDFEOS files, this handler requires at least
libdap 3.6.0.

Version 3.5.0

  This handler can return the DDX response (which is an experimental feature,
not to be relied upon).

  This version of the software has been converted to work with the 3.5.x version
of the OPeNDAP data server.

  It uses automake and includes a spec file that can be used to build RPM
packages.

  Some of the test files have been modified because they included images 
compressed using a lossy algorithm (JPEG). It's hard to verify that the 
values in the files are correct, so I've removed those from the files.

  Known problems:

  An issue with HDF 4.2r1 and earlier versions of HDF4 has been discovered. In
some cases a file written using an older vesion of HDF4 that contains CHAR8
or UCHAR8 SDSs may not be correctly represented as a DAP2 Grid. Instead it
show up as an Array.

  Bug #61: Vlens (which are one-dimensional arrays with an undeclared length
and cannot be subsampled) appear as Sequences. In version 3.4 access to
these using the [] array access notation was broken. Requesting [0:4] returned 
the first four elements, not the first five. That problem has been fixed, but
the larger issue of representing vlens as sequences has not. 

  Bug #71: The dot (.) character is 'overloaded' in that it can be both a 
separater and a regular character in an identifier. If a Structure name 
contains a dot, trying to access a field using 'name.field' breaks since
'name' contians a dot itself and the parser thinks it's a separator. The 
fix for this will be introduced in DAP3. Until then, use the shorthand 
variable referencing notation where a field is requested using the
unqualified field name.