HDF AND HDF-EOS WORKSHOP I (1997) Source: http://localhost/workshops/ws01/presentations/GSFCDAAC/GSFCDAAC.ppt

1. GS
FC
DAA
C
Scientific Focus
• Atmosphere
– Global 4-dimensional structure of the atmosphere (temperature, humidity,
clouds) for atmospheric dynamics studies (TOVS, AIRS, Assimilation)
– Upper atmospheric wind profiles, chemical composition profiles and energy
input from solar radiation, solar wind, x-rays (UARS, TOMS, HIRDLS)
– Regional (35N to 35S) rainfall rates for a better understanding of global
hydrological processes (TRMM)
• Ocean
– Global and regional estimates (1 km and 4 km resolutions) of phytoplankton
and marine primary productivity using visible and near infrared imagery
(CZCS, SeaWiFS, MODIS)
• Land
– Long term, global land vegetation mapping using visible and near infrared
imagery at 8 km spatial resolution (AVHRR)

2. GS
FC
DAA
C
HDF / HDF-EOS Data Sets
HDF
HDF-EOS
TOMS
UARS (ma ybe )
S EAWIFS
TRMM (1997)
CZCS
MODIS (1998, 2000)
TOVS
DAS (1998)
AVHRR
AIRS /AMS U (2000)
HIRDLS (2002)
MLS (2002)

3. GS
FC
DAA
C
Current HDF Tools
• Visualization / Analysis
– Freeware (Collage for HDF, EosView for HDF-EOS)
– Data set specific packages, e.g., VISTAS (TOVS), VisuAnalyze (TOMS)
– Web based data set browsers
– Commercial packages, e.g., IDL, SpyGlass
• Utilities
– Annotation, metadata extraction
– Continental subsetting
– HDF-to-binary conversion
– Interactive geographic subsetting tool (FORTRAN and C)

4. GS
FC
DAA
C
Additional HDF Tools
• Web or GUI based tool to allow user to specify file characteristics
for the automatic creation of HDF file
• Browse-o-rama type tools that shield user from HDF-specific
terminology
• Subsetting tools allowing user to more easily select geographic
subregions and/or parameters
• Translators to allow users to easily convert from HDF to their
working format
• Utilize information on fill values and scaling (gain and offset) when
displaying HDF data
• Include capability to change projections when displaying HDF data