Dear All, We know how to specify the Missing Values in NetCDF file(using Missing Flag) and draw it in expected color(e.g., black, gray..). But I have another kind of values in NetCDF(in addition to missing values) which I need to mask (draw it in a controllable color, because these values are not the normal valid measurement values and also we do not want to describe them as Missing values). How can we define them in NetCDF and draw it in a desired color? Thanks, -- Yunyao "Frank" Qu Satellite Active Archive (SAA) NESDIS, NOAA