If you want to save a VisAD data object and read back as you
saved it, consider using visad.data.visad.VisADForm (name
inspired by spam, spam, spam, eggs and spam). It can save
data using Java serialization, or a custom VisAD binary
format. The Data object will come back exactly as it was
But of course, if you want to exchange data with non-VisAD
software, then netCDF is better.