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CodesUI is an interactive application built on ecCodes to inspect

WMO FM-92 GRIB edition 1 and edition 2 messages
WMO FM-94 BUFR edition 3 and edition 4 messages.

With CodesUI it is possible to:

inspect the overall structure of GRIB and BUFR files
examine the data and metadata of the individual messages

For BUFR data these additional features are also available:

filtering BUFR messages
extracting tabular data from BUFR messages
plotting BUFR observation locations on an interactive map

Please note that although CodesUI has some basic plotting capabilities it is not a visualisation system.

CodesUI shares its codebase with the GRIB and BUFR examiners of the Metview meteorological workstation system.
It was packaged as a standalone software application with the minimum possible dependencies requiring only ecCodes and Qt5 for installation.