title: Reading Grib2 files for lat/long data
body: <p>Anybody here doing meteorological or earth-sciences work? I am trying to work with GRIB2 format data files. There are libraries available, in particular the Unidata GRIB Java Decoder. And I can see exactly how to extract data in a big linear array, but what I want to do is access values by lat/long. Can't find any simple example on how to do that. Suggestions?</p>
  
  <p>TIA!</p>