LOSSLESS COMPRESSION OF DATA, IN PARTICULAR GRIB1 FILES

摘要

The method for compressing 3D data, in particular 3D meteorological data and, more specifically 3D data in GRIB1 format, wherein the 3D data comprises several layers of 2D data, comprises the steps of (a) determining the differences between respective adjacent data within each of the 2D data layer so as to obtain 2D differential data layers, (b) determining the differences between the differential data of respective adjacent 2D differential data layers, and (c) compressing the 2D differential data layers obtained in step (b) using a 2D data compression such as e.g. JPEG LS or JPEG 2000.