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Metview has a built-in facility for using the same contouring styles for certain fields as ecCharts does. Create a new Contouring icon and set Contour Automatic Setting to Ecchart and Grib Scaling of Derived Fields to On. With this setting, various parameters from the GRIB data are used to choose a contouring style (if it exists in the ecCharts style library). In fact, this same icon can be used for both fields!
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