Dear Thomas I agree with you that for many purposes cells are not required (e.g. you don't need them for doing contour plots). I also agree that in practice (again, such as making contour plots) you assume the data applies at points, even when it is extensive in space. In a sense, it is somewhat undefined for model data whether it is point or cell; in a model, space is quantised so the distinction is blurred.
You are right, I am not enthusiastic about making a formal relation between the vertices and the gridpoints! However, I would not be against including a statement in the convention that the gridpoint should typically be positioned within the cell, rather than on the boundaries, if there is no good reason otherwise. Maybe we do say something like that, but I can't remember where. I agree that we should have a debate. Others' views are welcome. Best wishes Jonathan _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
