Hierarchical Data Format (HDF) is the standard data format for all NASA Earth Observing System (EOS) data products. HDF is a multi-object file format developed by The HDF Group.
NSIDC created this site to answer common questions about HDF-EOS and to provide simple methods for working with the HDF-EOS format. Follow the links below to read more about working with HDF-EOS:
Overall summary of the HDF-EOS format, including structure, data types, and justification for the development of HDF-EOS.
Steps for dumping HDF objects into flat binary format using the HDF Group's hdp utility and the NSIDC's IDL program hdfeos2bin.pro.
Simple steps for converting HDF-EOS files to ASCII format with the ncdump utility.
Methods for determining the geographic coverage of data files and utilizing existing geolocation information.