In the past year, The HDF Group reengineered the HDF5 OPeNDAP handler to support the easy access (visualization and analysis) of NASA HDF-EOS5 and HDF5 products via OPeNDAP. We will demonstrate the visualization of NASA HDF-EOS5 and HDF5 products such as Aura HDF-EOS5 products, MEaSUREs SeaWiFS and GSSTF products, and Aquarius product via the new HDF5 OPeNDAP handler. In addition, we'll demonstrate some updates on the handling of MODIS data via HDF4 OPeNDAP handler.