Type: 
    Extension:
      Version: 
  Compression:
  Color Depth:
   Maintainer: 
Specification: http://www.mediatel.lu/mmedia/render/files/ncsa_hdf.pdf

HDF is an object-oriented interchange file format used to transport image
data from one machin architecture or operating system to another with no
conversion problems or loss of data. Both 8- and 24-bit raster images are
supported, color palettes, and data compression (RLE, Incomp, and JPEG).

The latest version of HDF is 3.3 and comes with a complete library of
functions for manipulating HDF files, includeding the netCDF library by
Unidata.

Information on HDF is available from The HDF Information Server maintained
by the National Center for Supercomputing Applications:

  http://hdf.ncsa.uiuc.edu:8001/

The HDF FAQ is located at:

  http://hdf.ncsa.uiuc.edu:8001/HDF-FAQ.html

Other HDF-related Web sites include:

    Heirarchial Data Format (HDF)
    http://www.ncsa.uiuc.edu/SDG/Software/HDF/HDFIntro.html

The HDU 3.3 User's Guide in both PostScript and MIF format:

  ftp://ftp.ncsa.uiuc.edu/HDF/Documentation/HDF3.3/Users_Guide/

Source code for HDF may be FTPed from:

  ftp://ftp.ncsa.uiuc.edu/HDF

And HDF-related discussions may also be found on the Usenet newsgroup
sci.data.formats and in the FAQ for that newsgroup.