Dear Thomas I think it may not be explicitly written down in the CF standard, but it is certainly assumed that the coordinates you give (xc yc) are the gridpoints. For an intensive quantity, the default interpretation of the data is that it exists at particular points, which are those specified by the coordinates. Your application is making a surprising assumption in taking the coordinates to lie at the corner of the cell. As you say, CF provides bounds in order to describe cells, because that's not what coordinates are intended for.
Cheers Jonathan _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata