At present The Met.
Office uses a number of different code forms for the transmission of data.
Two of the most widely used are GRIB and GRID code formats. Although GRIB and GRID are both used for the transmission of grid-point data they have one very big difference. GRIB is, as the name suggests, a binary code, whereas GRID is a character code. It is used for the transfer of processed data in the form of grid-point values. The data are coded in binary form for transmission.