As an author of a popular weather data display I believe the standard should describe the center point's of the data.
Both Wind barbs or vectors and contour rendering must use the true locations of the values, not the edges of a virtual cell. In my software only earth conformal images are treated as if they have a true extent, all other data are considered to be valid only at the dimensionless point in space. The users choice of rendering determines whether the points fill the cells or are represented by some other graphical means. -- Frank Hage fh...@ucar.edu National Center for Atmospheric Research _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata