This article is from the Scientific Data Format Information FAQ, by Ilana Stern ilana@kiowa.scd.ucar.edu with numerous contributions by others.
HDF (Hierarchical Data Format) is a self-defining file format for transfer
of various types of data between different machines. The HDF library contains
interfaces for storing and retrieving compressed or uncompressed raster images
with palettes, and an interface for storing and retrieving n-Dimensional
scientific datasets together with information about the data, such as labels,
units, formats, and scales for all dimensions.
Source code and documentation are on <URL:ftp://ftp.ncsa.uiuc.edu/HDF>.
Some general information on HDF, including a FAQ, is available from
<URL:http://www.ncsa.uiuc.edu/SDG/Software/HDF/HDFIntro.html>.
The HDF WWW information server, with links to the above plus an in-progress
HTML reference manual is on <URL:http://hdf.ncsa.uiuc.edu:8001/>.
 
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