Module 3: Browsing HDFEOS Files

1
Module 3 Browsing HDF-EOS Files
HDF-EOS files A wealth of information
http//hdf.ncsa.uiuc.edu/hdfeos.html
2
HDF-EOS -- Background

• HDF Developed by the National Center for
  Supercomputer Applications (NCSA)
• HDF-EOS An improvement on original HDF
• - Includes georeferencing info.
• - Swath and grid capability
• HDF EOS Contains nested files in a hierarchy
• HDF EOS Completely self describing files

3
Tools for Browsing HDF-EOS Files

• Many free tools available
• HDFLook http//www-loa.unilille1.fr/Hdflook/.
• Msphinx http//www-loa.unilille1.fr/Msphinx/.
• Webwindshttp//www.scconservices.com/rel4/webpage
  /wwhome.html
• HDF Browser http//hdf.ncsa.uiuc.edu/
• For just browsing and investigating
  HDF-explorer is personal favorite
• http//www.space-research.pt/
• Proprietary software ENVI, NOESYS, IDL, Others
  getting better

4
Many grid fields In 1 file
5
View un-scaled image data
6
View scale factor
7
(No Transcript)
8
Scaling

• Must apply gain, offset to decode from digital
  number (DN) . . .
• Biophysical Value
• gain (DN offset)
• 0.00001 (8323 0) .8323
• NDVI 0.8323

9
Projection information