Re: GridCoordinateSystem

Hi Don,

> I'm testing an EmpricalCS and that seems to do what I want
> (mostly).  I can't seem to create an isosurface though.

Keep us posted on this problem. I would be surprised
if it is specific to the iso-surface logic.

> Since it's not really emperical, I thought the GridCS should
> work though.

Feel free to create a new GridCoordinateSystem constructor
signature that enables non-null default Units. It should
have been in the class to begin with.

Good luck,
Bill