On Thu, Dec 10, 2015 at 8:19 AM, Jonathan Gregory <[email protected] > wrote:
> After that proposal was agreed, we had some further discussions concerning > the > relationship of gridspec and ugrid and how they could be made more similar. > I remember that conversation, though I never took the time to look at gridspec. For reference, here is the current UGRID spec: https://github.com/ugrid-conventions/ugrid-conventions/blob/master/ugrid-conventions.md I just looked at: http://www.gfdl.noaa.gov/~vb/gridstd/gridstdse3.html#x5-240003.4 And my first impression is that while it is handling the same information as UGRID, it's pretty different, at least with respect to variable names. My impression is thus: gridspec was developed to support a certain set of (structured) grids. The unstructured bit was then added to well-match the model and conventions that had been established. UGRID, n the other other hand was built from scratch, based on CF and the vocabulary and conventions that unstructured grid (oceanographic) modelers use. So it's a more wordy, but actually matched pretty well with what FVCOM, ADCIRC, SELFE, etc already put out. So: I don't think that we in the UGRID community are going to want to turn what we'be got on end to match gridspec. I suspect the gridspec community is in the same position. Thugh: how much is gridspec used for unstructured grids? If not much then maybe just drop that support, and use UGRID. HOWEVER: I haven't looked closely enough -- maybe the differences really are just vocabulary -- so maybe we could unify them if we allow multiple names for the same thing. i.e, in a triangular mesh grid, you specify either: var_name:cf_role = "face_node_connectivity" ; or var_name:standard_name = "neighbor_cell_index" though, honestly, gridspec doesn't look very CF-y to me anyway :-) -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [email protected]
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